Well, there are really two aspects, and I'm not sure which one the Prime Minister was focusing on.
One is disagreement over issues, or we might even call it polarization. I suspect that, when you have proportional systems with more views entering the Parliament rather than being excluded because they don't get enough votes in any particular district to get elected, then there will be more disagreement.
What I'm focusing on is the second aspect, which is how that disagreement finds its way into discussion and ultimately into some kind of compromise or legislation.
The experience of proportional countries that I've been looking at for many years is basically that you don't have the kind of very confrontational attitudes, or you have far less of it, than you have, for example, in the British House of Commons or the Canadian House of Commons. So yes, there may be more disagreement, but I think the system basically says, “Okay, you express your disagreement, but since there is no majority government that could impose its will any time it feels it can, you're going to have to find some kind of compromise and some way of working out your disagreements.”
I don't know where Mr. Trudeau stands on that, but for me, the experience is very clear.