I don't think it's a stretch to say that many radicals are similar to each other - not in declared ideals, but in observable methods and behaviors. There's a point when this radical zeal and "anti-establishment" thinking overrides any other thought process.

Which is how radical right and radical left have managed to converge on hating NATO and sucking it up to Putin in many countries. As they did before on COVID restrictions, and long before that on trying to "cancel" media for wrongthink, and before that, and before that. Radicalization is enemy of thinking - which horseshoe theory illustrates.