So all people who believe in a God hate gays? I think what you mean is all people religious or not who target gays should be ashamed. Or is it just the religious ones who should be ashamed? The disgrace is sloppy thinking.
No. God may not exist for you but if you want to know should at least have look.
I can't tell you where to look. I can only tell you what I did. I don't believe in religion and so have no handbook to guide me or you.
I'd go along with this. You've either had an experience with God or you haven't. If you have you'll believe, if you haven't you probably won't.
I do think it slightly odd that a lot of non believers haven't actually looked. I think most religions think that you need to put in a bit of seeking...