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

[robvalue]

And even if they are right, they can still be morally bankrupt. God can be an arsehole. If Christianity is to be believed for example, that's exactly what he is. The idea that God has to be good is a massive unfounded assumption.

They have to be morally bankrupt, practically by definition, by requiring their followers to submit their own moral compass to the pronouncements set out in a book deemed inviolable and unquestionable. It's equivalent to getting them sign over all control of their bank details to an anonymous team of financial wizards, whom they never see and who are only spoken about, in reverent tones, and how dare you say it's a scam, you blasphemous heathen!

Absolutely. Any attempt to codify morality into being "objective" is highly dangerous and should be fought against; religious or not. It's completely futile of course; morality remains entirely personal no matter what anyone says about it. All that changes is whether someone tries to force their version onto others.

The act of picking a religion, and then filtering its texts until it matches what you want morality to be anyway is so hopelessly subjective that I don't know how anyone can think there's any objectivity to be found in the whole process. Although the "picking" is most likely done for you by your parents, before you've developed proper thinking skills.