In this case, the Republican party is objectively authoritarian - and arguably neofascist. For all of the faults of the Democrats (and there are many) they are not actively hammering on the foundations of Democracy. Their leader did not just attempt to overthrow an election. They aren't actively undermining the ability to vote, or trying to put corrupt officials in place who will overthrow elections that don't go their way. The Republicans have done or are doing all of these things.