Well firstly nearly every Indian Muslim I have met has been incredibly patriotic, it didn't matter whether they came from Gujarat, UP or the South. In actual fact most of the teasing and banter about cricket and the Pakistan V India rivalry was from the Indian Muslims, where as their Sikh and Hindu counterparts were not that bothered. Most tend to be well mannered and polite.
I have come across haters, although they did it in a subtle manner i.e. blaming our forefathers for splitting India and weakening the Muslims. This bunch, in my opinion, has steadily grown to quite a substantial part of the population.
In terms of Kashmir, nothing. They are steadfast in the belief that it's part of India, and they can take care of the needs of Kashmiris.
What else? They don't really mix at all with the Pakistani community here, and there are communities of Indian Muslims living near Pakistani communities e.g. Blackburn, London etc. They have their own mosques and centres, so have a separate identity when it comes to faith.
Oh and Indian Muslim females tend to be quite fit. But marrying a Pakistani is frowned upon, even though there is a growing numbers of girls from the community marrying Pakistani males. But the male is scrutinised, interrogated and it's literally a battle to get her folks to agree.
There has never been any real tension, and erm that's it.