People to the left of Liberals aren’t Tankies, but Tankies whinge that the winner is not left of Liberal. They would probably also whinge about an NDP PM. The only outcome I can see them celebrating is conservative victory. Tankies are scum of the earth.
The discourse on Lemmy however is a tendency to use “tankie” as some kind of othering identity marker. If I, an NDP and QS supporter, raise my hand and say “excuse me but Carney is a right wing Liberal, and I’m not comfortable with how the Overton Window has shifted to the right in Canada”, there is a clear narrative that will lump me in with the Others, right? Who by virtue of being tankies are therefore traitorous to Canada and therefore, hello, here’s the old red scare trope of “fellow travellers”, “pinkos” and “useful idiots”. Let’s not pretend that’s not the case.
You’re right, demanding we expand NDP while throwing the election to conservatives does make you a traitor accomplice. And regardless of figure of speech, there is no virtue among tankies. If you want to move the overton window left then remove as many conservatives from office as possible, that is the only path forward.