Proportional representation's advocates invented the concept of the wasted vote, claiming that votes for losing candidates are wasted, and that under PR "every vote counts." But ultimately there is no decision. And that surely is a waste of voting.
I do not know the solution to small-mindedness as a part of conservative political strategies, but at least part of the answer requires progressives to ask some rather basic questions about what they believe and why. Here are a few starters.