Perhaps, you can first begin by asking yourself if YOU have any kind of belief, (not necessarily religious, but of any kind of beliefs which provide you a sense of guidance).
If so, from that, allow that to be your understanding to provisions of a means of acceptance/tolerance of other's choices....Maybe tell yourself, that since you have your own choice of belief, then they, too have the same right to choose theirs?

I believe that since ALL religions and/or beliefs of superior guidance is from ONE source, anyway, (although many dispute that fact...their choice), it only makes sense that we ALL have the equal right to our individual choice of HOW we perceive that one belief.
So, in other words, (that is if you do have your own belief), what you believe is the same as what other's believe. The only difference is in individual choices, that's all. It's all one in the same, despite how we choose to perceive "IT".

Hope this makes sense to you, and that it's helped some.

Shangrala