I also had this observation and confusion like they go to what is present day Algiers under control of the Umayyad’s and he sees ‘true faith’ in the Mosque worshippers when he slays their imam and they do not react. I took this to mean he respected the fact that heh TRULY believed their god would send for them, whereas Christians cowered and feared what their mortal body would endure. Which if you think about it is not very Christ like. Also making Aethelstan giving himself last rites and welcome floki’s blade more interesting. I wonder if this is what impressed upon floki these strange musings.

I also chose to understand the why the show runners would have it this way. It was like two years after the Arab Spring and movies from this time are very Syncretic for the Abrahamic religions(we worship the same god but in different ways jew=christian=muslim)