Interesting site! Lots to look at, although it's certainly upfront about its bias and agenda. But since I'm not aware of any sources outside of India or Pakistan for good information about Kashmir, that site is a good place to start.
I'm having difficulty reconciling your demographic factoid with the statement from the article I quoted, though.
I'm not an expert either. But after reviewing some of those websites, and seeing what Islamists are capable of, that did for me.