I think it's hard to draw that line on extremism. Conversation and finding consensus are much easier if people build their world view and values on as small bas

I think it's hard to draw that line on extremism. Conversation and finding consensus are much easier if people build their world view and values on as small base assumptions as possible. If we cannot agree on base assumptions and values it's much harder to have a fruitful conversation especially if these assumptions cannot be violated because they were hand down from god. Religion generally makes numerous and very large assumptions.