If you want a real look at this discrimination i suggest you send an email to the kundeling rinpoche or take a trip to dharmsala your self, there is a thread on the gelugpa section saying this place is run by the tgie that in its self is proof enough of their sectarian hatred of shugdens, not to mention that they have no spine and are incapable of doing anything without the dalai lamas say so, there are plenty of videos on youtube about whats happening to the dorje shugden followers.
have a happy research hunting.
