Atheists, tell me, a Roman Catholic: why should I become an atheist?

[pocaracas]

3) God's necessity isn't an assumption. The reality of "necessary being" is a conclusion drawn from the datum of existence. You can disagree with the conclusion, but that doesn't mean my conclusion is an assumption. The existence of being-itself is a conclusion drawn from the things we directly observe to exist. Being-itself, on the same logic that leads to that conclusion, is false only if nothing at all exists. It doesn't seem that controversial.

The thing being an assumption is twofold, here:
1. The being - why must the necessary creator/starter/initiator/spark/mover/etc be a being? Automatically, you are assuming consciousness, awareness, intent.
2. Name it a god. God, as a word, carries a huge baggage. Since time immemorial, mankind has worshiped gods. They, the gods, have been many things, but typically, they are rulers, creators, fathers, mothers, generators of natural forces. And mankind still, to this day, retains the feeling that such god(s) need(s) us to kneel to them, as if they're petty human rulers; or grovel for their love as if they are petty human parents; or praise them as if they're petty human heroes. If there is an ultimate creator entity, it should care little for our groveling, our love, our worship, our praise. Much as you care little for an ant's groveling, love, worship or praise... you don't even see them as fit to carry out these complex tasks.
Why should an ultimate creator care for you? Oh... he created you out of the mud, you may say?... just adding more baggage, I say.