If you are a pastor there is no way you can lose faith without losing face, you are considered the devil incarnate by your former congregation

Yes an atheist priest can perfectly minister to a believing congregation and miracles can happen in that congregation. Miracles depend on the faith of the believer, not that of the officiant. A bartender who never takes alcohol can serve alcohol to his clients. What is necessary is that the priest believes he is doing the good work. The congregation needs faith and it helps them. It would be evil to deny them such a service in the name of his lack of faith. - Bangambiki Habyarimana

Atheism is not against god, it is against the religious establishment who use god they have never seen or heard from to establish their influence over the minds of men.

What is needed is not that a religion be true, meaning that what it claims exist beyond the ink it is written with in a holy book. That is hard to prove. What is important is that a religion be a good system to help us mere mortal deal with our short and troubled life in the universe. Whether what we hope for in the afterlife materializes or not is not important, what is important is that we believe it will materialize and that gives us hope.

All atheists will go to heaven. If god exists, not believing in him does not take him away and he cannot justly condemn those who seek him earnestly and cannot find him. He would even reward their earnest search for him.

God has not yet revealed himself to no one in no unclear terms. Religions are attempts to find him; on that level they are all equal