I'd never expect Christianity to "have all the answers". Ha. Far from it.
But when people proclaim that there is only 'one true way,' and it can only be accessed through their own particular version of an invisible friend, I reserve the right to ask them questions about their invisible friend, and about his laws.
I think your points are valid. I have those questions myself. I just think the evidence available to us points toward christianity. Post 174 certainly not exhaustive but i think is instructive.