What were nietzsche's views on god and religion?

"God is dead."

That's a great starting place. Nietzsche was an atheist. Moreover, he believed that giving up on the idea of a supreme being and refusing to follow a religion released one into a way of life that allowed one to be the best human being it is possible to be. Adhering to religion and living life according to the goal of reaching a paradise in the afterlife stunts people's development into who they truly have the capacity to be.

EDIT: He absolutely did NOT consider himself the antichrist. It would be difficult for someone who did not believe in God or the Christian religion to believe such a thing. He did write a book entitled The Antichrist, but it wasn't about himself. Also, the title was originally in German (as Nietzsche was German), and in German, that word can either mean "the antichrist" as in a single person and "anti-Christ" as in, anti-Jesus and anti-Christian religion.

I think he despised all religious dogma.

He categorised religion into: master-morality and slave-morality.

A religion for the masters and a religion for the slaves. Each created by themselves. So they are very subjective and biased.

Christianity is a slave morality according to Mr. Nietzsche.

I think he thought the two were BS. If I remember correctly, he considered himself the anti-christ or something of that nature.