Hoffman didn’t know he was Jewish until he was 10. He family is Ashkenazi Jewish from Kiev (Ukraine) and Romania.
Although I don’t think those two countries have anything in particular against the U.S. at this time. Who was running past the explosions at the time they went off? Were they the targets?
Hoffman not knowing he’s Jewish would not affect his appearance.
If there were eastern Europeans involved it would more likely be Bosnians or Chechens.