Yeah of course, brexit has fuelled the nationalists, on both sides of the debate, but my view is that, for the SNP, they were looking for any excuse to reignite their cause for independence.
My initial cause to comment was on the idea that "England rules Parliament", when England doesn't have a Parliament of it's own, and it's MP's represent their constituencies, and also the belief that "if Scotland has a referendum, it can leave". It can't, not without the consent of its other, equal members of the Union. Only NI has that automatic right to leave if they chose to do so in a referendum that could neither be blocked or opposed by the UK Government and Parliament.
It's another example of typical anglophobic scot nat ramblings claiming England controls what the UK does, which hypocritically, is the exact same argument those who support brexit say about the UK's position in the EU Parliament; with the UK being Scotland and the EU being Westminster; many of us feel our voices aren't being heard. Yet they reject UK independence claims under that premise, but oppose the UK union and support Scottish independence by the same example.