Um, no.
I said I wouldn't want ex-IDF in those positions. IDF soldier != Jew.
I don't want any ex-soldiers of foreign nations, particularly ones that hold dual citizenship, in any areas concerning American national security.
And I can think of any number of things that someone investigating terrorists in the United States might come across that would jeopardize investigations, but would directly involve risks to foreign nations. For example, a Hamas-linked organization in Texas.
It was not clear by the article that the Jews in question were or were not former members of the IDF. However, all Israelis must serve a minimum of two years in the Israeli Army. So, by your logic any former resident of Israel who is now an American would not be allowed to translate for the FBI.
And I can think of any number of things that someone investigating terrorists in the United States might come across that would jeopardize investigations, but would directly involve risks to foreign nations. For example, a Hamas-linked organization in Texas.
And how would being a Jew jeopardize an investigation of an Arab terrorist group like Hamas? If anything, the Jew would want to help even more. How would being a Jew, investigating Hamas be a risk to another foreign nation? That is a completely paranoid view of Jews and Israel.