Many nations have provences or states within them. The USA has 50 states and a number of territories. I would have no objection to this site having a Quebec flag, and similarly a flag for each state and territory in the US. But what's the point? It seems very confusing.
Man, there will be so many flags that no one will know where anyone is from!
What other nation in the world recognizes Quebec as a nation? You are referring to the "nation within a nation" motion which was just political maneuvering.
Couldn't one say this is the same as with the UK? I'm not an expert on their foreign relations, but I've never once heard of the US leadership meeting with Northern Irish or Scots about treaties, trade, etc. It's always the PM. The countries in the UK have limited rule, except for England, which doesn't have a separate government from the UK.
Seriously, what makes Northern Ireland, Scotland, and Wales more independent than Quebec, or any of the 50 US states?