This is an interesting article and discusses the point (of which I agree with) that the concept of self-determination is rather more limited than what people believe and definitely does not support a secessionist agenda:

"In the contemporary times nationalistic/secessionist self-determination is discouraged and every State with minority population offers a procedural remedy from internal self-determination perspective to maintain its territorial integrity. It is significant to mention though procedural remedy to peoples claim to self-determination is not always the answer, what worked for Hong Kong was not a solution for Kosovo."