It's ridiculous how quickly liberals will jump to whitewashing fascism. When Hitler ran, he lost, and it was an economic liberal who appointed him as part of what amounted to an anticommunist coalition. Furthermore, those who did vote for Hitler (and we can say those who voted for Nazis generally, since even the "left wing" was just using a different framework to condemn all Jewish people), the Holocaust's specific form was undecided but Hitler was screaming in Mein Kampf about the need for Europe to have no more ethnic Jews, and "the Jewish Question" was a standard element of political discourse where basically any member of the Nazi Party would give you this or that reason to reach the same basic conclusion.

So they are telling two lies pulling in opposite directions -- exaggerating Hitler's popularity and then absolving his supporters -- where the only real commonality is whitewashing fascism. It's seriously just Nazi apologia.