We are not programmed to be rational. Anyone who is not aware of that, will end up picking irrational positions unless thinking things through. Of course, an echo-chamber... the cancer hall of the day... is the breeding ground of irrational behavior.
Many people profit from these lies, unfortunately nothing except fighting against such scam artists works.
Disagreed. We have the innate ability to reason, ergo be rational. Unfortunately not everyone uses that ability or, if they are on the backside of the IQ bell curve, they would rather use emotional means such as violence, verbal abuse, hate, etc in order to get their way.
Neither side is immune to these sorts of people, but there are certainly rational people on both sides just as there was in Jefferson and Hamilton's time.