They don't have the morally high ground. They chose to help a fascist get to power.
Kamala Harris, the Democratic Presidential Nominee, lost. Because of her poor campaign tactics, she allowed a fascist to get into power. Are you equally upset with her for not doing what it takes to stop fascism?
If not, why was the "right answer" for this election to support Israel when we know that she lost following that tactic, and not supporting Palestine?
So the key to beating fascism in your mind was to platform the same policies, but a little less? What do you actually think Harris should have done differently that would have helped her win the election? Because clearly, doing the same thing but slightly less bad didn't work this time.