Agree, nothing wrong with sovereignty, especially if it is sought to escape tyranny. Of course, I'm no great believer in the necessity of every ethnic group forming its own country. The most successful countries in the world are products of the opposite trend: increasingly heterogeneous populations, not ethnically monolithic ones. The further away we move from a clannish mindset based on superficial ethnic ties the better. I'd focus on securing more individual and economic freedoms rather than the pursuit of some sort of ethnically pure wonderland, especially when lots of violence is the means which you're using to get there.
I agree with that personally. But that too needs to be done "organically" (meaning arising on its own, free from the directions of central-planners or collectivists). When you have collectivists or authority making up borders on their own – despite opposition from inhabitants – that will never lead to a harmonious society. Majority of Chechens will never like Russia because of its imperial transgressions, and the average Russian will never like Chechens because they have been demonized and looked as terrorists.