They're no less at fault. Fascists were always going to vote. Non-voters had the power to decide. Self-titled "centrists" and "apoliticals", or those who adopted a stupid moral high ground because of one thing that Harris did or did not say, made a choice that amounted to "I'm okay with the worse outcome". They failed to vote against the worse outcome.

Fascism is a cancer that should be excised with prejudice. So is abstention. And Americans should hold them equally responsible for every harm and every life.