I don't think the problem is that it's opinion-based; it's that it lacks focus. Kashmir and Xinjiang are the center of two different geopolitical disputes. In Kashmir, the focus is on disputed territory which is claimed by two nuclear powers. In Xinjiang, the focus is on a region where China places heavy restrictions which has lead to credible claims of genocide.
That's the difference in a nutshell, but the detailed distinction is much more complex. It's like asking about the different types of government between the US and Germany. They're both representative democracies, but you could have a Wikipedia article devoted to all the subtleties that set those two countries apart.
That's why I voted to close it as 'unclear'. The question should (in my opinion) be more focused to lead to more narrowly focused answers. An added difficulty with the question is involving how the US views the situation. That could lead to a more narrowly scoped question: how does US foreign policy view one conflict compared to the other? The question doesn't really do that. The question body purports that the two situations are similar and then asks for confirmation.