Christians take on the more nihilistic atheists

[henryp]

(First off, I'm saying nihilistic, but I don't know what it's really called.  Whatever it is I am.  Materialism is another one that seems to hit a lot of the notes)


I know the moral argument is a big one for Theists in attempting to expose inconsistencies in many Atheist belief systems.

But what do you have for the the Atheists who don't believe in meaning, or morals, or even free will.  I know during my time as a Catholic, I always tried to present the alternative to an existence of God as, rationally, a very undesirable reality.  The obvious flaw, which surprisingly went unchallenged (although Atheism hadn't caught on yet), was that being undesirable has no bearing on something being true or not.  So while I dumped God due to my perceiving it as goofy, I stuck by my guns so to speak, and more or less ended up where I said I should rationally end up.

So for those of us who skipped over humanism and went straight to believing it's all just a big evolutionary hoax, do you have arguments for those people that poke holes in their rationality?

(I'd be interested in non-theists take on poor reasoning as well)