It strikes me there's a very simple reason why religion causes so many problems. Too often people don't stop at the self-improvement aspect that religions began with. They go further and try to foist their beliefs on other people who don't share them.It seems to me that the great religious leaders like Jesus and Buddha were only giving people guidance on how to live their lives more creatively and productively. Which is harmless enough. If you're focussing on your own life, that leaves other people to get on with their lives in their own way and no toes get trodden on.
As I see it, Jesus and Buddha never saw their beliefs as something to be imposed on others, to be followed obediently by masses of people. That desire to proselytise, to convert, to turn religious beliefs into social norms, was something that came later, something hatched up by followers with an authoritarian streak.
And that's where all the trouble starts. As soon as you stop treating religious beliefs as a personal matter informing your own life, and your life alone, and expect everyone else to follow suit, naturally it's a surefire recipe for opposition, resentment and violence.
Those who are told they have to adopt certain beliefs whether they like it or not, regardless of their own existing beliefs, will inevitably turn on these religious bullies and tell them where to stuff their unwanted dogma.
Personally I'm inspired by the principles and beliefs of Buddhism, particularly Zen Buddhism. They've been a great influence on my thinking, the way I live my life, and how I relate to other people. But I would never dream of telling others to follow the same principles, and telling them that if they don't they're hopeless sinners and blasphemers and infidels. To do that seems simply intrusive and impertinent.
As the Buddha himself said, "Be a light unto yourself." That's clear enough, isn't it?

