The differences of opinion are still there in irl leftist spaces but it alters how it feels when you’re actively doing something. Online you only see the differences in opinion but the real leftists aren’t just arguing details online (though they do that too) they’re running food banks and organizing housing cooperatives and coming out en masse when someone is being evicted. They’re putting together food packages and sending books to inmates. They’re hiking out into the desert to leave water for migrants and waiting by the train tracks to toss food up to travelers.

Bickering about details online might seem ridiculous to someone who isn’t involved but for the actually active leftists that part is only a sliver of their leftism and it’s not necessarily a bad thing— it’s very hard to imagine the world organized other than it is and one way we can be prepared to make the right decisions together when gaps appear is to discuss everything from every angle. I’m not going to pretend all the stuff online is in good faith and I suspect a good percentage of keyboard warriors who are not actually involved in leftward movement, but I do think in the context of real activism the bickering makes more sense.