People feel the need to signal their tribal affiliation and attack those from other tribes. Been part of human behaviour since humans began.
Anyway, your experience of any social media depends on how you curate it. For example I only follow professional photographers on Instagram so that's the only kind of content I see there.
That's not entirely true anymore. Many users of Twitter have recently mentioned the alarming number of violent videos being added to their "For You" suggestions. These users are largely self-siloed into the industry they operate in and self-describe as people that dont follow "fight video" accounts or people that consume that content.
It seems either the suggestion algo has been broken, is being gamed by users, or the platform owners are choosing to feed users toxic content that they didnt request for some reason.