Important to note that Christianity also spread amongst the poor/common/persecuted folk first. It wasn't really spread initially by any power structure or crusade.
And Christ straight up kicking out business from the church (as in he flipped their tables over, literally):
And Christ straight up kicking out business from the church (as in he flipped their tables over, literally):
https://en.wikipedia.org/wiki/Cleansing_of_the_Temple