Everybody sins,and everybody justifies their own sins and condemns the sins of others. It's just the way humans try to feel good about themselves.
Humans also justify their own deity while condemning others in order to feel good about themselves.
Its like going to a job interview and disparaging all the other candidates which one knows nothing about...merely displaying one's personal state of insecurity rather than merits.
-Bulletproof and Waterproof don't mean Idiotproof.