we need to start thinking about the christianization of europe as the unwanted, violent colonization of an indigenous people by a foreign culture, in a process that has very strong parallels to the later spanish and portugese (that is, brown people) domination of africa and latin america, who themselves were following a papal regime built strongly on the caliphate, itself modeled on the roman emperors, followed later by french and english merchants (half-colonized white people) looking to control the trade of resources.

so, there's some problems with this picture. frankly, most of it is wrong, because it's following official dates. that wide swath of pink may have been officially christian by the year 600, but that doesn't reflect actual practices by real people.

as mentioned, we have evidence of paganism surviving throughout europe well into the renaissance and beyond. nowadays, when we talk about the inquisition, it is to remind people how stupid and barbaric that christian colonization was in europe, but we don't stop to think that they went on witch hunts because indigenous religion was still extant and vibrant, if underground. we imagine that they were just randomly accusing women of witchcraft, when the evidence rather suggests that in many of the formerly celtic realms at least (british isles, spain, france), they were burning witches because people were continuing their indigenous practices, outside of the sanction of the authorities, who wished to stamp it out. we have weird, choppy narratives of gatherings around groves talking place in the aftermath of the black death, and can only fill in the blanks. we have evidence of sympathetic magic and human sacrifice all the way into the enlightenment. even newton was a known alchemist.

the christians were defeated in the end, and it was a hard struggle that we should be proud about winning; we shouldn't let history assert a false narrative of "christiandom" that never actually existed on the ground. we should celebrate our independence struggle against christianity, instead.

you can add 300-500 years to most of these numbers, if you want a better picture of reality on the ground. but, it's the right way to look at this.