well said for a farmer. ;) I don't know if this is true, it certainly would hold if your initial premise about Islam is correct. I will tell you, I have heard it said that Islam produces slaves to rules, and that, as we all know, is the road to death -- just think of Judaism by the time Jesus walked the earth -- look at the way the Pharisees dealt with transgressors -- it was positively inhumane.
There is a key to this, I think. I can see it, but I am not sure I can describe it in any way other than the most cursory sketch, and that is this: Mary. The intercession of Mary (my apologies if you don't see the importance of Mary to the Church).
My friend informed me, during one of our chats, that the Koran has a book about Mary in it. He knew nothing more about it (which I suppose supports your argument that a moderate Muslim is an apostate one -- and forces me to clarify the term "devout" -- he was sincere so far as he was a practicing Muslim).
In any event, I believe a holy woman, a mother's desire, would be an end to this hostility between sons. And if it is to be, I believe Mary will be the key.