I think vote shamers do that bc otherwise they are not politically active except for the occasional rally/protest (if that); and in order to feel some sense of control/empowerment they hyperfocus on blaming someone (a non voter, a 3rd party voter) for everything that's wrong with the US to avoid the reality that the US is what's wrong with the US and voting in national elections won't change the fundamental harms this nation is predicated upon and runs on