Why would Satan want souls? What use are they to him?

[Esquilax]

Then...why do "we" exist? Why does anything exist?

Atheists not having an answer in no way increases the truthfulness of any religion.

What you are saying is there is no [reason] for life, except to die. And that there was no basis we are brought into being.

Don't you have things that you enjoy and are meaningful to you beyond religion? Why are those things not a good reason for your life? I guarantee you there are people in your family who like having you around independent of a creator god; that's a reason right there.

To a logical person, that should make no sense at all. There is always a reason (cause & effect)....some reasons we aren't sure of. So we search.

Yes, we do search. Why is not having the answer yet a bad thing?

Why are we here? I say God. For atheists? Its not all that clear to me.

There's no particular reason why we're here, but that doesn't reduce the meaning in life that we make for ourselves.