It is a mistake to think that one cannot be a good Québecer, even a nationalist Québecer, and not be a good Canadian, too.
Anecdotal evidence: I have a friend, not too strong a word, who is great believer in French Canada, as an idea and a reality. She is a good Québecer and a strong Canadian who has served her country, at home and abroad, for many years. She has no patience for separatism because she believe:
1. Québec is better, not just better off, as part of Canada than it could or would be as an independent nation. (My, personal, experience is that the more Québecers have travelled the world the more Canadian they are, too.)
2. Separation is a dream and most of the dreamers do not understand the harsh realities that the process of separating would bring forth. She knows that the process of getting there, to independence, would divide and destroy Québec before it could recreate itself as a new nation.
But she is no fan of Canada as constructed and governed. She wants a better country - one in which (probably fewer) provinces have much more independence; one in which Québec can be as French as it can manage even though Canada does not even pretend to be a bilingual country, although it would be, by virtue of Québec's strength within Canada, really bicultural.
I vaguely recall she and I developing a model like that (five (?) provinces with a weaker national government, with minimal overlaps in areas of responsibility) on a beery long weekend, at a cottage party that was dominated by separatists, but with a good many Canadians for whom sovereignty is a red flag. She and I developed our position in order to point out the logical weaknesses of both the separatist and Canadian positions. My recollection is that we carried the day - but there was so much booze (and other distractions) that I cannot be sure.
The point is: a fleur de lis does not equal a separatist any more than sporting a maple leaf makes one a Canadian.