No they won't. Because if public opinion ever shifted that much, the CPC would shift with it. That's the reason why real parties have leadership elections every few years, and also why the same two or three major parties have remained the major parties since the beginning, even though Canadian society, culture and values have changed drastically since then.

That's why fringe parties remain fringe parties - because if there were any market for their ideas, the major parities would adjust themselves to cater to them.