Tolerance, now a days is a really hard thing to find. People don't seem to tolerate the existence of other people. Especially people don't tolerate other's beliefs. We have no right to kill someone if they believe in a particular religion, what harm does it to you? Everyone should have a right to live their life peacefully and freely.
I don't think that tolerance is hard to find nowadays, I think that it's even easier to notice now. Look, how many people have different unusual clothing styles, many people are untradicional sexual orientation, but it's more ok now than back in those days. But I agree that is still a lack of tolerance especially in religions aspect.