There are a lot of Jews who want to demonize Germans and the German people. But German people who decided to commit genocide of Jews were “normal” people, like any Joe American.
There were historical events that led the Germans to believe that Jews were a serious threat to their national security and to their personal religion of Christianity, and they saw the annihilation of the Jews as a self-defense mechanism.
If Americans feel threatened like the Germans did almost 100 years ago, it is possible that the American people may resort to similar defensive measures, as the Germans did.
In fact, this happened often in history with people who felt that their religion was threatened by Jews. Edit of Expulsion of Jews from Spain in 1492 clearly point this out as the reason why the Spanish people decided to expell all Jews from Spain.