Now, how do we do that?
First of all, we have to convince SJWs of the importance of the cause. SJWs do what they do because it makes them feel important, and if the cause doesn't make them feel righteous and important, they won't take it up. So, to do this, we have to gather all the bullshit Quebec's anglos make up about the place and how horrible and oppressive it is, and feed it to the SJWs. But that's not enough. If they feel like they're defending white people, they'll balk at it. No, we have to make them think that Quebec is equally, if not more hostile to non-white, non-francophones. This won't be hard: Quebec anglos have been building that narrative for 5 decades. We have to make it look like Quebec is a nightmare for everyone who isn't a french speaking white.
It's also important to make it clear to them that it's not just the PQ (Parti Quebecois, the main separatist party) which is behind it. We have to point out that these "racist, exclusivist" policies are not only being upheld by the federalist party (the Quebec liberals), but that some were even started by them. The SJWs need to be convinced that Quebec nationalism is something intrinsic to all french canadians, and that it is the result of a fundamental flaw in their french heritage, which can only be removed through anglicization.
Now, for some talking points:
1. Bill 101. This is a law, or rather a set of laws concerning the use of french in Quebec. It is meant to force people to have french instructions on their shit, french lists of ingredients, force business owners to allow their workers to work in french, force commercial signs to have french words on them, etc. If you don't know what it is, I suggest you take a look at it: It's all fairly reasonable stuff, especially in a place where over 80% of the population speaks french at home. But google it and you're sure to find plenty of people describing it as a grave attack on their human rights. We want SJWs to make those statements their own.
2. Equality. Convince SJWs that it is aberrant that french is privileged in Quebec, when Quebec is only one province of a diverse country where most people speak english. Get them to claim that english should be on an equal footing with french in Quebec. If you feel bold, try and get them to claim mandarin should also be on equal footing.
3. Anglicization. By convincing SJWs that Quebec nationalism is an inborn flaw resulting from french heritage, you can convince them to claim that the solution to the "rampant bigotry" in Quebec is assimilation. Get them to suggest forcing english in many places, especially in public functions or to be allowed to practice certain professions.
4. Last but not least, convince SJWs to lobby for federal interventionism in Quebec. We need to get them to believe that none of their solutions can be applied in Quebec because of the french canadians' stubborn bigotry, and thus the solution is to have the federal government take over and implement the "solutions" by force. If you can get them to claim Quebec's provincial government is incompetent by referring to equalization payments, even better.
Furthermore, with the blind anti-Quebec hate found in many citizens of the RoC, many will swallow their bullshit and repeat it ad hoc. It will be fucking glorious. If you're worried about Quebec nationalists, don't be: They know damn well that all of those claims are bullshit, how to respond to everything they'll be spewing, how to deal with it. They've been doing it for 250 fucking years. Separatism only looks in shambles right now because it has no enemy to fight. Like a Don Quixote finding no foes, and resorting to fighting windmills.
It will be easy to convince SJWs to take up that cause. Canada's MSM have spent decades building that narrative. The only reason SJWs haven't taken up the fight is because their movement has only been a significant force for less than a decade, and Quebec separatists have not been an issue in that time, so the MSM has been mostly passive on the topic. The hard part will be convincing them to focus on it. To build a movement on it. To build the anti-Quebec BLM.
But if we manage to get them to do that, I guarantee results will be worth our trouble.