Actually Kashmir is wanted by pakistan that's why they attacked when the kashmiris refused to be part of it.The problem with kashmir is not all about religion because there are hindus and buddhists as well.The name of kashmir is J&K i.e Jammu and Kashmir,Jammu part is dominated by Hindus while kashmir is 90% muslim while in laddakh region many are buddhist.
There is very little support to pakistan from kashmiri people say 5 to 10%. and even that is changing with economic boom and positive vibes about growth through out the country, the perception of even hardcore muslims kashmiri people are changing towards India.
What I meant was that Kashmir was once part of a "muslim empire" and according to that religion, once moslim land allways moslim land. When muslim land becomes part of a non-muslim land it must be retaken.