Right, so nobody should support either genocidal candidate, but especially the one actually doing genocide right now.
Re: fascist autocracy, this doesn't really describe the MAGA political class, which remains fundamentally liberal, just openly reactionary instead of pandering and politely reactionary. You'll notice that the Biden-Harris administration has continued many salient "fascist" policies from the previous admin and even tried to flank from the right on immigration.
Fascism is a historical development that uniquely opposed an ascendant leftism during liberal imperialist crisis. The conditions in the USA do not qualify.
I don't think they have the correct analysis on electoralism but I do recommend that people join PSL (and educate themselves so that they can be ready to join) if that is their preference, as they are revolutionary comrades with 99% good things going.