> They only want to keep us divided and fighting amongst ourselves so we don't unite and fight against them.

This is obviously true, but the reason they're able to do it is that there is a legitimate disagreement about the most core beliefs that roughly splits our society in half. Yes the politicians are self serving, but that doesn't make them wrong when for example they say "democrats want to murder babies" because their supporters do genuinely believe abortion is murder. That's not manipulation really, conservatives would believe that either way. We divide ourselves very well without any grand conspiracy.