That's a very good point, one I usually agree with, but every once in a while I run into an exception.
For example, I mentioned tattoos and homosexuality. Both hurt no one in my opinion, and yet are forbidden in Christianity. Beer, which I love and respect, and hopefully will never abuse or lose, is forbidden by over a dozen religions.
Many religions believe it is prudent to actively tell people of other religions that they're wrong, without any proof that either side is right or wrong.
Christians forbid males to wear head gear in their religious buildings. Jewish people often require males to wear head gear in their temples and synagogues. What's funny is that for women, it was once encouraged that the exact opposite happen for both.
There are
a lot of examples, mostly small stuff, but still, the point is that I don't mind taking each religion's teachings on a line-item-veto basis, so long as I'm left with a philosophy that discourages harm to others.
I'm not big on people engaging in organized religious practices (e.g. prayer) that is specific to a certain religion during public functions where there's a chance that not everyone there subscribes to that religion. I tend to subscribe to the separation of church and state, while still recognizing that both are important to people, and that both can still have their place in peoples' lives. That, to me, is a bit harmful to people that want to do organized prayer in a public school, but it's less harmful than what happens if you encourage it.