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

[Mudhammam]

1) How can humanity be the centerpiece of any deity's plan, when we were no more than one mutated species on a tiny speck of dust in an incomprehensibly vast universe? 

My Answer: God loves us that much.

2) Why were there billions and billions of other planets out there, almost all of which are completely uninhabitable to us? Why are there billions of other galaxies, billions of other suns, billions of other solar systems, and here we are, on this one, tiny planet? What is the purpose for all the rest of it? 

My Answer: Personally, I am looking forward to spending part of my heaven ... exploring the heavens. And with a glorified body, it could well be that I won't even need a space ship to do it. I want to see a comet close up. Explore other worlds, observe quasars, visit some of these other galaxies and solar systems, etc.

3) Why would God care about us?

My Answer: God is love.

4) Afterlife?

My Answer: The martyrs believed in it enough to give their lives for it.

5) Lack of miracles in today's modern world?

My Answer: Goes along with the lack of faith in today's modern world. That said, there are still miracles in today's modern world ... there are also skeptics around who deny them.

1) What does God "love"? Humanity as a species or individual human beings? If you love someone, then you desire that which is best for them.  If you are able to provide that which is best for them or prevent that which will prove harmful from taking effect, and moreover, you can do so at no cost to yourself, then you immediately bring that which is best for them to fruition... without fail.  But we observe that God fails at this continuously, for individuals and for humanity as a species.  So much for 1 Corinthians 13:8!

2) This person believes that in their "glorified" body they're going to fly around the Milky Way galaxy and explore black holes?  Well, shit.  At least Mormonism promises to make you a god over your own planet.  But if this whole life everlasting is really everlasting, believe me, you'll outlast the interesting things that there are to see and do.  Unless the idea of flying around large chunks of rock and giant balls of gas strikes you as an activity that could literally never get old... similar to how I view humankind's extraordinary vanity and the foolish thoughts it puts into motion. 

3) God is love?  But I thought God loves.  So, love loves?  If I love my dog, do I God my dog?  What does that mean?  I love good feelings.  Then is it correct to say that I God good feelings?  But I thought God was good.  So must I God God feelings?  Hmm.  It seems that, literally, God is not love, but rather love is an expression of God that He is alleged to display from time to time... but in a timeless way.

4) Which martyrs?  We're talking about Greeks? Persians?  Jews? Muslims? Christians?

5) Define "miracle."  What does it matter if any of those involved possess faith?  What evidence is there for a miracle, and what justification can one mount that this is related to their pet metaphysical entities?