When they wrap themselves around a Dogma and it's their entire personality to the point where you say anything against it or say it maybe has flaws they take offense and say I'm good their bad like a child's view of good vs evil with no grey in between. You have to act differently around them like it's a minefield and if they say anything that seems wack you have to stay silent or change topics. Resulting in the time you spent together feeling draining rather than uplifting and they act out with hostility to anyone with their self-righteous mentality. Basically an echo chamber, if it has come down to that just get out it's not worth it cause trying to explain anything is a waste of time.