see, it's not just an issue in quebec, either. i'm not on the fence this election - i've already decided that i will not be voting for the liberals. but, if i was, a commitment by trudeau to fight the issue in court, or even a refusal to commit to not doing it, would lead me towards refraining from voting for him.
there's two reasons for this.
the first is that i support quebec's sovereignty rights, in this case. people forget that national unity isn't just an issue in quebec, it's one that resonates throughout the country. i'm not a quebcois identity voter or something, but, whether it was because of the way i was raised by a french canadian father or just because they're by far the most left-leaning place in north america, i tend to be on quebec's side more often than not. there's a lot of ontarians (and manitobans. and easterners.) like me that will essentially stand in solidarity with quebeckers from a distance. on the other hand, in alberta, you can win an election by attacking quebec.
one of the reasons i refrained from voting ndp in 2015 was their stance on quebec sovereignty. the liberals are usually the better national unity option here. but, as has generally been the case with trudeau, he's flipping that issue on it's head, and taking the side of the party's historical opponents.
the second is that i'm one of the 40+% of ontarians that would actually vote in favour of such a ban in this province should it be put up for a referendum. i'm just actually in support of the law.
so, don't think it's just quebeckers that trudeau needs to worry about in coming out shooting against this law. it could cost him the election.
https://www.thestar.com/politics/political-opinion/2019/09/16/bill-21-pushed-to-forefront-of-federal-election-talk-in-quebec.html