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

[Mr Greene]

Balaco

 I'll have to look into what religion is even correct. Even if Christianity is correct, I don't even know if Roman Catholicism is even the correct Christian faith to follow.

I might suggest taking a peek at some of the other denominations services and noting in particular their effect on the followers emotions (and yours).
This really is the essence of what is being pedaled, emotional control. After all if you aren't in control of your emotions, who is?
A lot (possibly all) of the christian stuff replaces "spirituality" with emotionality. Thus 'emotional' becomes "spiritual" to confuse the audience and place the speaker at an advantage.

Frankly speaking the onotological argument is a waste of time unless your god is Tinkerbell who pops in and out of existence based on your imagination. 

Thank you for bringing this subject up, my step daughter is being targeted by Mormons and the revision of conversion techniques is timely.