These are good critiques. We need to be hard on ideas we agree with as well as the ones we don't, or we will fall into the same trap.
From my observation, some people can't form an identity of their own, so they look to an external source. It can be a person, characters from a book series or a political party. In my experience, some of those people are attracted to extreme political opinions because they want an excuse to be violent, rather than the extreme views making them violent.
I have a friend who identifies strongly as part of the rainbow community to the point where sometimes his thoughts are indistinguishable from the hive mind. He bought that Harry Potter game on PlayStation but kept calling JK Rowling "a fucking bitch"... out loud in the office. The third time he said it, I turned my chair, stared at him and said, "Come on now", and I genuinely think it was the first time he actually heard what he was saying; it was like the end of a prayer for him. He is intelligent enough to read the room, unlike others. He is so focused on being "the good side" that I think he gets lost in what being a "good" person actually means; for example, I think he cares about individuals who happen to be women, but is reasonably misogynistic if given the opportunity.