I’m mostly a lurker, but I think it’s a mistake to say (at this point) that Trump is promoting fascist ideology.
He shares many traits with dictators of various stripes. He is thin-skinned, and employs angry, racist, demagogic, populist rhetoric. He appeals to a desire for an authoritarian strong man who knows what is best and just does it.
But he isn’t promoting aggressive, nationalistic, total war. If anything, his rhetoric has tended to be on the isolationist side.