One thing that always struck me in my Eastern Religion class (which was a great class and had real material, unlike my Eastern Philosophy class which was a complete waste of everyone's time) was that the professor stressed and proved that Hinduism is really not a religion a person can convert too (despite many attempts be hippie dippies) because it is so insanely complex and such a deep rooted part of Indian culture, not to mention it's one central concept is the complete opposite of the western religions central concept that is ingrained in our mindset (regardless of our individual religion)
Which is why I find this particularly humorous. I'm pretty sure Hindu's are not overly concerned with westerners failing to fully get their religion or remotely worried about us appropriating some of their practices. In fact, to do so would be completely at odds with both their culture and their religion.