If you mean “It’s rational to be a Christian”, then I can agree with you. If you mean “Christianity is rational”, then I don’t. This is because being a Christian can have psychic and social benefits.
Right, there’s not much correlation between religiosity and being a good or bad person.
I’m an atheist, and I have a sense of community, it’s just not based on a shared religion, but rather other shared aspects of culture, place, and time. So it’s not an either/or situation.
As to why people should persist in living, that’s something each person has to confront. I hold that that there is no meaning to the world beyond what meaning we, as individuals, give to it. Christianity is one such meaning, and if it works for you and doesn’t have harmful consequences that outweigh the benefits, then by all means, continue.
That’s one approach, yes. But, note that if you don’t believe in a god, then you won’t be screaming out that God makes no sense, will you? If you believe in a naturalistic world of cause and effect, and don’t search for some deeper meaning behind events, then you don’t have that dilemma of trying to reconcile an omnipotent god allowing and creating human suffering. In that case, your grandson died (in your hypothetical) in a friendly fire accident; he died because he was mistakenly shot. No god orchestrated it.
Christianity is more than just the text of the Bible, it’s also the actual practice of Christianity. And this actual practice doesn’t include god being a sadist.
Logic is only as good as the premises that underlie it. Here, I can use logic to prove that black folk are inferior:
Human worth is measured by acheivements in technology.
White humans have made the most such acheivements.
Non-white humans are worth less than white humans.
My premise is faulty, not the logic, yes? Then again, I only took one college course in logic, so I may be wrong here.