Of course the MB allied itself with the Nazis. They were fighting for (what they saw as) their freedom from British occupation. When we did the same we allied ourselves with an absolutist monarchy, despite the fact we were fighting for republican ideals.
Where did you think Arab rebels would look for support? They looked to the enemies of their enemies, just as the Irish did.
Don’t get me wrong, I’m no fan of Islam or especially Islamists. But to try to say Islamism “is” fascism is I think a step too far. It’s certainly been influenced by it, as unfortunately has our own society. The most important roots of Islamism go far into their own history and culture. The various European ideological features are sort of tacked on for decoration.
Depending of course on your definition of fascism.
I’ve seen similar “explanations” for Japanese militarism of the 30s and 40s, as if Japan didn’t have sufficient militarism in its own history to explain things.
Other cultures are able to come up with bad things without necessarily copying them from western civ.