The answer you are looking for is - no, of course we can't just choose to believe something that doesn't make sense to us. By extension, punishing someone for their beliefs, something that is beyond pure choice, is unreasonable. To torture someone for eternity for it, is indefensible. To claim then that the torturer is just or merciful, is laughable
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No Comment.
But let's move on... question no.2... Allah knew he was going to send some people to hell forever... before he evented them. Yet he, needless being that he is, still created them. Why? Does he like torturing people?
I can't answer why God creates Humans when he doesn't need them. I just take the idea that he did and shouldn't need reason as it really boils to nothing in the end.
God doesn't like torturing people. But as with Justice it must be done I'm afraid.