I think the more realistic threat model is that people who disagree over issues vaguely related to 1 will be emboldened by filter bubbles from 2 and egged on by

I think the more realistic threat model is that people who disagree over issues vaguely related to 1 will be emboldened by filter bubbles from 2 and egged on by self interested subsets of 3 and 4 to get shooty with each other at scale.