Is Practicing Supposed Transubstantiation Falling Away?

CARM.org, while I don't agree with every point that they make--although I agree on the essentials--, makes a point about transubstantiation:

It should be obvious to anyone who believes the word of God, that the Roman Catholic doctrine of transubstantiation is not biblical.  For the reasons listed above, we urge that Roman Catholics recognize that Jesus Christ died once for all and that there is no need to participate in a ritual where His re-sacrifice is practiced.

Finally, because the sacrifice of Christ was once for all, it is sufficient to save us and we do not need to maintain our salvation by our efforts or by our participation in the Lord's supper.  It is not a means of grace that secures our salvation or infuses into us the grace needed that then enables us to maintain our salvation by our works.  Instead, we are made right before God by faith.

That CARM.org didn't reference the following is a little surprising:

Hebrews 6:4-6

New King James Version (NKJV)

⁴ For it is impossible for those who were once enlightened, and have tasted the heavenly gift, and have become partakers of the Holy Spirit, ⁵ and have tasted the good word of God and the powers of the age to come, ⁶ if they fall away,^[a] to renew them again to repentance, since they crucify again for themselves the Son of God, and put Him to an open shame.

Footnotes:

1. Hebrews 6:6 Or and have fallen away

Hebrews 10:26-31

New King James Version (NKJV)

The Just Live by Faith

²⁶ For if we sin willfully after we have received the knowledge of the truth, there no longer remains a sacrifice for sins, ²⁷ but a certain fearful expectation of judgment, and fiery indignation which will devour the adversaries. ²⁸ Anyone who has rejected Moses’ law dies without mercy on the testimony of two or three witnesses. ²⁹ Of how much worse punishment, do you suppose, will he be thought worthy who has trampled the Son of God underfoot, counted the blood of the covenant by which he was sanctified a common thing, and insulted the Spirit of grace? ³⁰ For we know Him who said,“Vengeance is Mine, I will repay,”^[a] says the Lord.^[b] And again, “The Lord will judge His people.”^[c]31 It is a fearful thing to fall into the hands of the living God.

Footnotes:

1. Hebrews 10:30 Deuteronomy 32:35
2. Hebrews 10:30 NU-Text omits says the Lord.
3. Hebrews 10:30 Deuteronomy 32:36

Evangelical and truth-seeking Catholics: please take note and run while you can, or--if you're called to stay and be used to reform the Roman Catholic Church--pray on your calling to help reform the Roman Catholic Church. By the way, I have previously referenced the Yeshuat Yisrael study on Hebrews 6:4-6; and in other words, you will not lose your salvation if you participate and have participated in transubstantiation. But be warned:

⁹ For we are God’s fellow workers; you are God’s field, you are God’s building. ¹⁰ According to the grace of God which was given to me, as a wise master builder I have laid the foundation, and another builds on it. But let each one take heed how he builds on it. ¹¹ For no other foundation can anyone lay than that which is laid, which is Jesus Christ. ¹² Now if anyone builds on this foundation with gold, silver, precious stones, wood, hay, straw, ¹³ each one’s work will become clear; for the Day will declare it, because it will be revealed by fire; and the fire will test each one’s work, of what sort it is.¹⁴ If anyone’s work which he has built on it endures, he will receive a reward. ¹⁵ If anyone’s work is burned, he will suffer loss; but he himself will be saved, yet so as through fire.

Remember, "if we sin willfully after we have received the knowledge of the truth, there no longer remains a sacrifice for sins"; and in supposed transubstantiation, "they crucify again for themselves the Son of God, and put Him to an open shame." If you fall away, you "will suffer loss; but...will be saved, yet so as through fire." But you do not want to fall away.

Staying Silent Is Yielding To the Apostates and Legalists, So...

Since Paul openly rebuked Peter for giving up on something "pagan", I am not afraid to do the same to some others regarding Christmas (cf. Galatians 2:5). I know that if Christmas were pagan, it would not be attacked as such. Because Christmas was deliberately designed to celebrate the birth of Yeshua (Jesus), and as a redemption of and counter to the Winter Solstice, it is attacked as pagan (cf. Galatians 1:6-2:4, 5:7-12 Romans 14, Acts 15, Colossians 2:16-17, Hebrews 6:4-6). If I have to name names of those who are attacking Christmas as pagan, I will start naming names. 

If I have to lose friends and "friends", so be it. If I make enemies, good: that means that I stood up for something, sometime in my life. I'll stand up for this:

In the early years of Christianity, Easter was the main holiday; the birth of Jesus was not celebrated. In the fourth century, church officials decided to institute the birth of Jesus as a holiday. Unfortunately, the Bible does not mention date for his birth (a fact Puritans later pointed out in order to deny the legitimacy of the celebration). Although some evidence suggests that his birth may have occurred in the spring (why would shepherds be herding in the middle of winter?), Pope Julius I chose December 25. It is commonly believed that the church chose this date in an effort to adopt and absorb the traditions of the pagan Saturnalia festival. First called the Feast of the Nativity, the custom spread to Egypt by 432 and to England by the end of the sixth century. By the end of the eighth century, the celebration of Christmas had spread all the way to Scandinavia. Today, in the Greek and Russian orthodox churches, Christmas is celebrated 13 days after the 25th, which is also referred to as the Epiphany or Three Kings Day. This is the day it is believed that the three wise men finally found Jesus in the manger.

And:

hy do we have a decorated Christmas Tree? In the 7th century a monk from Crediton, Devonshire, went to Germany to teach the Word of God. He did many good works there, and spent much time in Thuringia, an area which was to become the cradle of the Christmas Decoration Industry.

Legend has it that he used the triangular shape of the Fir Tree to describe the Holy Trinity of God the Father, Son and Holy Spirit. The converted people began to revere the Fir tree as God's Tree, as they had previously revered the Oak. By the 12th century it was being hung, upside-down, from ceilings at Christmastime in Central Europe, as a symbol of Christianity.

The first decorated tree was at Riga in Latvia, in 1510. In the early 16th century, Martin Luther is said to have decorated a small Christmas Tree with candles, to show his children how the stars twinkled through the dark night.

Don't you ever to my face again twist the meaning of this parsha, which is not a reference to Christmas trees:

 To whom will you liken Me, and make Me equal 
      And compare Me, that we should be alike? 
       ⁶ They lavish gold out of the bag, 
      And weigh silver on the scales; 
      They hire a goldsmith, and he makes it a god; 
      They prostrate themselves, yes, they worship. 
       ⁷ They bear it on the shoulder, they carry it 
      And set it in its place, and it stands; 
      From its place it shall not move. 
      Though one cries out to it, yet it cannot answer 
      Nor save him out of his trouble. 

And do not twist this, either. It is a reference to ba'alim, not Christmas trees:

 ¹ Hear the word which the LORD speaks to you, O house of Israel.
² Thus says the LORD: 


      “ Do not learn the way of the Gentiles; 
      Do not be dismayed at the signs of heaven, 
      For the Gentiles are dismayed at them. 
       ³ For the customs of the peoples are futile; 
      For one cuts a tree from the forest, 
      The work of the hands of the workman, with the ax. 
       ⁴ They decorate it with silver and gold; 
      They fasten it with nails and hammers 
      So that it will not topple. 
       ⁵ They are upright, like a palm tree, 
      And they cannot speak; 
      They must be carried, 
      Because they cannot go by themselves.
      Do not be afraid of them, 
      For they cannot do evil, 
      Nor can they do any good.”