I get what you're saying and theoretically you're right in some contexts but I would just like to say that I think you're completely wrong here.

As somebody that has always been diplomatic in conflict resolution.: I feel that talking is too late. They don't care, they have an agenda, they will carry it out.

You can talk out a problem with a rational thinking person, but you can't reason with the people that think what they are doing is OK.

There was a newer study that has identified a personality trait. It identifies the type of person that supports hairbrained ideas from a person they'd normally not agree with if they feel they are winning against the enemy.

So you have Christians who should denounce Trump for what he is and has done, but they feel empowered because he's helping the fight the enemy.

The whole American I got mine mentality personified To change their mind means they are losing.

My old inlaws grew up in wartime Germany, they describe what we see today as exactly how Hitler swayed the country. It wasn't till other countries stepped in with violence that the German populartion came to their senses. Talking to your neighbour about them supporting the SS changed noones mind ( that believed the Jews were the enemy.)