Belief forms behavior.
The world is aware how jealously the Jewish community guards the Holocaust, both as a memory and a weapon.
No authentic Messiah would inspire a religion that ended up calling upon the Jews to reject the manifest meaning of Sinai. It is really that simple.
In the last few decades, mankind has sinned terribly against the law of natural selection. We haven't just maintained life unworthy of life, we have even allowed it to multiply.