X embodies an attitude that we're seeing more and more on the "other side". It's a nasty combination of supreme self-righteousness and reflexive demonization. X can't accept that people of good will and decency might hold views that are very different than they do.... And so it's not enough to say Y is wrong; they have to be portrayed by X as moronic and a moral monster. This act is lovely coming from those who from time to time, and when it's convenient, lecture the rest of us on the importance of civility in public discourse.

Sounds like any politically-founded debate to me. X could be Tory, Labour, Democrat, Republican. I reckon, though, pdq is a Republican, given the slant shown...