The main difference between Islam and Christianity, theologically, is of course the divinity of Jesus -> I'll have to disagree but the answer would take an entire article.

about the idea of a “son of God,” and he said “no, it’s just a metaphor.” -> fate may have turned differently had your father been Catholic. Catholicism, as you may know, holds that Christ is both the incarnation of God on Earth while being His son. The Orthodox are more nuanced, considering that while Christ had one nature that was both divine and humane, He could not "be God" in the sense that the Holy Spirit does not proceed from Him but from God alone, highlighting a larger split between God and Christ than in Catholicism. Either way, Christ as the son of God is certainly not a metaphor but an empirical event. This is what set Christianity apart from the rest. Whereas everybody else has prophets, Christianity has God (or His Son), but in either way, the incarnation of God on Earth Who comes to share the sorrow of his people. Islam completely negates this aspect, going as far as saying that Christ wasn't actually crucified and wasn't the Son of God. This is heresy.

The rest of your explanation highlights how diverse the sources of interpretation of Islam are. I am sure what you are saying is correct, you know Islam much better than I do. I am also sure a lot of Muslims would disagree with you, and that's the problem. Islam in the West is whatever Muslims want it to be, and due to the strength of the community, the West must, as Michel Houellebecq eloquently put it, submit. There lies my problem with Islam. Its very nature is expansionist and colonialist. I care little for what Muslims do in their land. I care a lot for what they do in the West. And I don't like what they do in the West.

Similarly, I cannot agree with the argument of predestination, as this infers that evil is also God's doing or that mankind does not have any free will, which in regard to Christian ethics, is false.

No such thing as “random” -> I'd be more specific and say that the world is probabilistic, but definitely not deterministic. There is randomness.

I do not get into long comment discussions so whatever you answer to this, I will not read it and not answer. But if you want to respond, I suggest you write an article then tag me and I will be happy to read it and comment.

Thanks for reading and commenting.