I have sinned a lot. But my sins are not 'being gay', they are more common things like being mean to people, showing little respect to others, judge too quickly, etc. For those I will try to repent and I will try to be better in the future. He has committed a great sin but he is still a Christian. Also, gay people are not normally child molesters or murderers or bank robbers.
Most child abuse is done in heterosexual homes.
I think not, we have better things to do. I am a Christian. I firmly believe in Jesus Christ the Messiah, who is king over the world and my personal Saviour. Just because I don't act like you doesn't mean anything. Maybe you should do so, you would find loads of dedicated gay and straight Christians who devoutly believe.