Yemeni Jews are local Arab Yemenites who converted to Judaism hundreds of years before Islam. When Islam reached Yemen, many Jews embrased Islam but a few chose to stick to the old religion. So they are not Israelites. I dont think Israel is safer for them though it is better economicly.
Zimbabwean charged over killing of Cecil the lion (Reuters)
from the article: Yemen Jews smuggled to U.S. amid rising inter-faith tensions