alt Hacker News> Given the borrowing of ideas, why then do modern Christians, including evangelicals, dismiss other cultures so aggressively?
That's really just an American thing. Americans have this concept of "manifest destiny" in their culture is the final one and it is their duty to spread it to the rest of the world. The American settlers have colonized the entire continent, but the spirit of Manifest Destiny still persists, just embodied in different forms.
For example, among evangelicals there is this paranoia of anything that might be considered pagan. Some will go even so far as to consider Christmas pagan. Meanwhile in the rest of the world it's perfectly accepted that Christianity has taken some local practices and re-dedicated them to Christ. This is not a concession to pagans to make Christianity more palatable for them (pagans are not stupid, they know it's a different religion). I can recommend the YouTube Channel "Jonathan Pageau", he used to talk a lot about this sort of stuff in his older videos.
Not only that, but there are both non western Christian traditional (middle eastern, Ethiopian, Indian) and these are both accepted in the major churches (e.g. the Syro-Malabar rite within the Catholic church) and encouraged (its called inculturation).
> For example, among evangelicals there is this paranoia of anything that might be considered pagan.
Many Christians also see much of value in aspects of paganism. its pretty mainstream - for example CS Lewis argues that God can reveal himself to pagans too (there is quite a bit about this in The Pilgrims Regress).