A little more definition, there are over 3700 gods documented in human mythology. Many (so called) christians class those who do not believe in their particular god or in their brand of worship or their interpretation of the babble to be atheist.Just to define the argument a little;
Christians are those who follow christ and his word. Not everybody who warms a pew on Sunday is a christian. Few really are. Not every bishop, preacher, layperson, churchmember, etc is a follower of christ. Charlatains and hypocrites abound. Only the soul who has given himself to christ and is dedicated to his word is a christian.
High moral standards and good character should be the calling card of every christian.
An atheist is merely one who chooses not to believe in god. That in itself is not immoral. They may be some of the most moral individuals you will ever meet.
Also, the fact that morality existed amongst humans (and other higher animals) long before christianity was ever though of tells us that morality it not a christian trait but a human trait.