I don’t have a problem with Christianity per se. I believe Jesus was a holy man and a prophet, even though I don’t think he was unique or God’s only Son.
You may not think you have a problem with Christianity, but you do, because Christians believe Jesus was (and is) God incarnate. It won’t do to call Jesus a mere prophet or holy man. Prophets and holy men claim to speak for God, but they don’t claim to be God, which is exactly what Jesus did. He identified himself with the all-powerful Lord (Jn 8:58, 10:30). Either he was who he claimed to be, or he wasn’t. If he wasn’t, he wasn’t a holy man or a prophet, but a wicked man or a fool.