Quebec Breaks Free (A Little Bit)

Reuters reports:

Canada's Parliament recognized Quebecers as a nation within a united Canada on Monday, backing a controversial proposal that has already prompted one minister in the minority Conservative government to quit.

I've never understood people's concern about the possibility that a part of your country will break away. Why do people care so much? Is it just a fear of change from the status quo? A loss of certain resources? A diminishing of national power? I can't say that it would bother me much if a U.S. state decided to go it alone.