I couldn't agree more, however, a lot of people aren't happy with that and try to hard to impress their beliefs and ways on other people/communities...thats where it goes wrong!
I guess I'm like Paul and a few others here, I have no religion and choose to believe what I wish, but I do have full respect for others and the religions they choose to follow! But what ever people choose should be for them and not to effect others that wish for something different!
Personally I agree entirely; unfortunatly many churches do not. I don't know about Islam but the Christian faiths are actively encouraged to evangalise (Peter, I believe) therefore as a 'true' follower its your duty to 'encourage others to your way of thinking'.
To some minds it is a fairly small step to start knocking on doors (Witnesses) or possibly murdering everyone who disagrees (Crusaders and Inquisitors).
There needs to be a seperation of church from religion - and politics.