Those who believe that they have absolute truth and the only moral system are destructive both to themselves and to those whom they try to convert.
In 1965, I was teaching a seminar on freedom when I told my students that the ultimate freedom lay in casting a dice to decide what to do. They were so shocked and fascinated that I knew I had to write the book.
When I was a young man, barely 18, I discovered Jesus Christ as my personal saviour, and for six months I told my mother she was damned to hell. That wasn't much fun. I abandoned it.
The thing the Buddhists and the Sufis have in common is a belief that religious certainties are destructive.