Why do we judge and cause eachother so much pain?

Why do people care to or focus too much on controlling or changing people. I am a straight female and I could care less what other people choose as their mate (transgender, bi-sexual, gay, or whatever). Why must we force them into something that they are not. Prop 8 shoud have been illegal because it was discrimination no matter how you twist it. Yes, I go to church but some people take religion to another level and make it a personal issue. I have a mind of my own and when something doesn't make sense...I naturally question it. I am not disrespecting religion at all...I am just using common sense. There are more important issues in the world that DIRECTLY affect us and those issues need to be the actual focus. I rather have more people around that are happy being who they are.