Thanks for the good reading, Alan.
About the assimilation and intermarriage: It’s not (yet) happening in the sense it will change the religious preferences. And to be honest, why should it happen.
Western Christianity is perhaps the most hated religion in the world, and maybe we can not blame them.
Our colonial mentality is not one easy to digest.
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I might easily be mistaken, but I imagine that colonialism is way back on the very backmost of burners.
I think the truth has to be almost the opposite: those guys are here, not outside. It's first economics, then anger that they had to leave home to get into civilization again, having once had a leading one that brought us the benefits of many different sciences; that's a tough one to swallow, especially when you come to realise you brought most of its disappearance upon yourselves. The early Moors in Spain were perfectly willing and able to live alongside Jews and Christians, but a later wave of different colour of Islam put a stop to all of that and brought in intolerance; ain't all a one-way street, that.
Of course, our various crusades have been enshrined as works of the devil. When a church and various kings tell you you can pillage, plunder and rape, keep all you collect and still be forgiven your sins and reserve your apartment in heaven (exactly the same gambit that was used to wipe out the Cathars in southern France), love and respect are difficult to sustain, and some opposing forces do manage the respect part of that equation, but not then and in those circumstances. So yeah, whilst I never heard Rome offering any number of virgins after the event, the rest of the deal today, as seen from the Moslem perspective, ain't a hundred miles from that of those pesky men in armour. Goose, gander?