i think one of the biggest reccuring flaws i see in people i meet is that they form an opinion or feel entitled to say something about a subject before they even researched this subject properly.
people who claim communism won't work because of ussr don't know that ussr wasn't really communist at all, and there are leftist models of society that are vastly different from it
people who think that blm is a racist organization wanting special rights haven't researched black history