"Don't let your mind speak louder than your heart" - I think many have this so very wrong. Is support for fascism is a sensible, logical, well-thought-out policy? No, it's a heart-felt, emotional appeal to scared, proud, paranoid, crude, brutal people (who seem to be about half of our neighbors). surely the mindful decision is empathetic, constructive, and wise - not just base.
I don't think it's so simple. Support for fascism can seem sensible and logical if you let yourself think that between you and greatness stands a minority whose sole purpose is to prevent you from becoming great. You could argue it's not emotion but a calculation coming from struggle and an easy explanation for that struggle. Not every wrong assumption comes from emotion and we have the whole history of science to pr…
I'm not sure what you mean by that. Every assumption right or wrong comes from emotion. The problem tends to come when people let their emotions are left completely unchecked. "Bankers are taking advantage of me. My banker is an X minority. Therefore, we need to exterminate X minority" indeed has a nonzero degree of logic, but it's not the sort of reasoning 99% of people would come up with in a vacuum.
A counterpoint is that sometimes an irrational degree of emotion may be required to do extraordinary things like soldiers being brainwashed to fight even a defensive war, building a cathedral that fitting of the magnificence of god, or even a lot of cult-like startups.