> Sure it has merit to say that, generally speaking, Christianity espouses responsibility and atheism does not.

How can a lack of belief espouse anything? Atheism isn't a religion. The rest of your post seems to lack that fundamental understanding.

> I certainly cannot say that they all think the world has a deep meaning that they're directly involved in.

You also can't claim the converse, as noted atheism is a lack in belief systems, not a belief system unto itself. You're attacking straw men versions of atheists. Its like asking how many amps a battery has, or how many miles of work you can get from a gallon of gas. Without context the statements make no coherent sense.