This isn’t even about picking a political side. Being racist, misogynist, or calling to violence is not an opinion, it’s even downright illegal in some countries. There are plenty of subreddits on the political spectrum for example on economic theories, socialistic or capitalistic, or the pro/limiting immigration. But the line is clear with hateful content.
Of course it's not about picking political sides. I certainly did not intend to do so, if that's the impression you have taken. The sentiment is universally contemptible.
On principle yes. But I don't know where you live where this is commonplace, do you really see that in your daily life in the real world? There are misandrist feminists, but look further than Twitter drama, most feminists in real life are pretty compassionate with men. For example the concept of https://en.wikipedia.org/wiki/Toxic_masculinity despite what you may think is mostly about psychological distress and suffering on men. Same with anti-racists activists, it's mostly about compassion for other human beings in real life, anti-white racism is a fringe thing.
