According to Ynetnews:
The Jews living in Yemen - most of whom had the opportunity to leave for Israel or another country, but refused – face an approaching danger from the advancing rebel forces, who have repeatedly made statements against Israel.
"We don't want to leave. If we wanted to, we would have done so a long time ago," Sanaa's chief rabbi Yahya Youssef said in February.
So, many of them are doing what G-d warned against through Yirmiyahu (cf. Yirmiyahu 8:1-7). By the way, for The Jewish Agency for Israel and the Israel Ministry of Foreign Affairs to focus on those of us who Agudat Yisrael doesn't consider Jewish enough and would still like to go home to Israel would be nice, especially since (as YNet reports), "The Foreign Ministry and the Jewish Agency have been in an ongoing state of frustration over the refusal of Yemen's Jews to leave".
If they can and won't leave Yemen, perhaps they'd like to give the aspiring olim among them and us "not-Jewish[-enough]" Jews their opportunities, since they won't take them. Then again, Netanyahu and his government may not allow that to happen, since that might actually bring in Yehudim and others whom would vote Likud, Agudat Yisra'el, etc.. out of office.