> "If we've got one region (Quebec) saying, 'We're not going to move on self-government or Indigenous rights until the Constitution opens up,' it's simply that First Nations are being held hostage."

Actually, if I pull out my trusty (and dusty) BNA (British North America) Act, I believe 'aboriginals' are mostly a 'Federal' responsibility. 

So Quebec stamping its feet and refusing to cooperate might prevent any 'constitutional' changes from happening. But that still leaves the Federal Government with quite a broad range of possible actions. 

Instead of looking at the proverbial glass as 1/5th empty, they could look at it as 4/5ths full.