In general I'm not very interested or concerned with American politics since this is outside of my scope of influence. I cannot say how much that influences my experience but I can confidently say that I have not seen any genocide apologia and putrid racism.

The closest that I've seen is conversations about violence rates and nationality (in the context of immigration) but these topics have also been discussed in the liberal left Dutch newspaper (Volkskrant) and conservative center newspaper (Neu Zuricher Zeitung) that I read.

My main point would be that Twitter does a better job at not amplifying calls for violence than Reddit. I, obviously, do not have access to internal Twitter data so my assessment is purely anecdotal but nonetheless seems relevant to the conversation.