Pompeo, Hook and Bolton could emigrate to Israel they would look after them (or would they?) that part of the party never really got on with anyone!
EDITED: A badly researched comment by me being from the UK there, none have Jewish heritage so getting protection there might be difficult but some were heavily involved in Israeli/US foreign policy so they may well be welcome. These were all turncoats on Trump so there can't really be any surprise that he did this. I doubt anyone from Iran could get into the country and carry out an assassination any more than than the Russians could in the UK to try the same on defectors there, there has to be a reliance on local law enforcement at some point without having people with guns sitting outside your house, they also have the right to arm themselves.