Now as for effects of Hitler being a fascist, we likely would’ve seen a very quick conflict in Europe as a prelude to Trotsky. Chamberlain would’ve pro appeasing him, but Churchill’s so called Electoral Coup (as its called in the states, since he took the ministry in a complete shock-American policial analysts only gave a 17 percent chance of victory) would mean a swift end to that policy, because Hitler’s first move would certainly be going the Bohemian Republic, which Churchill was seriously invested in, having made a good friend of its President
Tomáš Garrigue Masaryk. This war would be a Britannic victory, and its early mobilisation would have seriously increased its economy, limiting the European Depression and had the empire more prepared for Trotsky, which would’ve lessened the bloodshed of the Second World War.
France would be hit worse than Germany. OTL, Hitler reestablished trade with France and Belgium. If he was fascist, he’d have promoted militant self sufficiency, and instead of helping rebuild the republic from The Crusader Rebellion I mentioned earlier, he might help reestablish The Crusader State of France as a puppet by funding the last bubbles of insurrection in Toulouse or Brittany. Worst of all would be the neigh inevitable genocide of Africans, Jews, Romani, and countless more.