I think fascism is a product of reactionary anti-communism that occurs in a society with regular fighting on the streets. One of the things it demands are class collaborationism to propell the race forward through war.

No major political party in the west is fascist.

Ukraine however actually does bear most of the warning signs albeit mitigated by the fact they are already losing a large war and do not have Germany's industrial capacity and so don't pose as much of a threat as the Nazis. While they are fascists they are fascists presently being handled. In the short term a sort of fascist internationalle similar to when Irish Catholics went to fight for Franco has arrisen to support Ukraine and suffered heavy losses which has been bad for local fascist groups around the world. Brazilian anti-communist militias dying in Ukraine can't have hurt Lula

At the end of the day though there may well end up with leftover networks of fascists armed to the teeth with weapons from the war accros eastern europe which will be especially dangerous if NATO protects them in the NATO countries