What's the harm? Maybe it's not useful (from a purely US point of view) to have Mexican's crossing our border, voting in our elections solely with an eye towards how the US can funnel more assistance to Mexico as some have suggested happens. Maybe it isn't useful for the US to give Israel a pass when they send controlled US technology to China solely because Jewish Americans are perceived to be willing to back Israel even when it works against US interests.
Sorry, bub. The burden of proof, IMHO, should be on those who'll tolerate those involved in the US political process who aren't clearly prepared to place the interests of the US first.
No bub. The accusation is that some people are not willing to place American interests first. The burden is on the accuser to prove the accusation. Being Jewish is no evidence at all.
Nicely put.