Christianity is not a monolithic religion. There is a vast amount of diversity. I am very content and confident in my moderately liberal Christian beliefs. I attend an affirming Episcopal church, and my Christian friends have no problem with me being Christian and gay. In fact it seems a non-issue to everyone I am in contact with.
It seems that conservative fundamentalist Christianity is what people think of when they hear the word "Christian". That branch of Christianity I will have no part of. In my opinion, that judgmental, negative, exclusive branch of Christianity has little to do with the teachings of Christ and the Bible. Too bad the more liberal, affirming side of Christianity doesn't get more attention.
The God of love is shown in the Bible. Through the life death and resurrection of Christ all are included in that love (grace). God loves me; I happen to be gay. What conflict can there be in that.
BTW I have no bad feelings about atheists. Everyone has a right to their belief system. I do not try to force my beliefs on others, and I expect others to do the same. There is room for all in this world if we are educated and reasonable.
For I am convinced that neither life nor death...neither the present nor the future nor anything in all creation will be able to separate us from the love of God that is in Christ Jesus our Lord. Romans 8:38-39