There is also an evolution of Buddhism that is occurring due to the Western perversion and fetishisation of it.
I suggest that perversion stems in great part from a prior perversion of the introduction of Mahayana Buddhism, which rewrote the dhamma and and included other beliefs from Hinduism and tantra.
Also, Westerners didn't pervert Buddhism, but Buddhists who brought it to the West. There may be other examples, but I'm specifically referring to Chogyam Trungpa, founder of Shambala Buddhism and Naropa University.
Edit: I will allow that Westerners may have played a role. I personally think there was social engineering at play in the introduction, same with the introduction of Hinduism with Swami Vivekananda and the second wave with the Beatles' guru. Much of this began, at least out in the open, with Theosophy, which was also active in England.
Hope OP is okay with this derailing. Every thread like this seems to derail in such a fashion. One reason why I threw in that beating to the punch.