I actually don’t believe this theory at all, but Richard is one of my favorite characters so I like to encourage any and all theorizing about him.
The theory starts out with some very interesting Richard Alpert connections. He connects him to the Dalai Lama and some other mystical character (I’m trying not to assume that I know what this person was talking about. The part that I don’t believe is when this theorist says that Richard disguises himself as Christian Sheperd (on the island). It’s a clever and unique hypothesis, but if you ask me, Richard and Christian have two very different goals. Richard has wanted to have Locke rule the island, and in my mind it appears that Christian wants Jack to lead the islanders.
Anywho, check it out if you’re interested.