>Why is it reasonable? Be precise – what do you think that they might do that other Israelis are less likely to do?

We are concerned that Israeli scientists much spread information about nuclear technologies, including weapons.

Israel (and its nuclear scientists) expressly REJECT non-proliferation treaties regarding nuclear technology. Some of the scientists applied for visas to come to the United States to further study nuclear technologies. It is in the U.S. interest to make sure that certain information does not spread willy-nilly.