You didn't make any argument there. You just attempted the guilt by association fallacy, which fell flat on its face as I haven't heard anything out of that man in years.

The left is famously ignorant of what the right thinks. Jonathan Haidt's experiments ask liberals and conservatives to fill out questionnaires about their values, then to predict how someone from the opposite tribe would fill out the questionnaire. He finds that conservatives are able to predict liberals' answers just fine and seem to have a pretty good understanding of their worldviews, but that liberals have no idea how conservatives think or what they value.

https://web.archive.org/web/20150428090025/http://www.aei.org/publication/liberals-or-conservatives-whos-really-close-minded/

When faced with questions such as "One of the worst things a person could do is hurt a defenseless animal" or "Justice is the most important requirement for a society," liberals assumed that conservatives would disagree.

http://theindependentwhig.com/haidt-passages/haidt/conservatives-understand-liberals-better-than-liberals-understand-conservatives/

See? That's an argument. It refutes the premise and adds references. You are welcome to add references that the left understands the right, but I doubt there are any. Typically it's just the "U R BAD" drivel posted above that nobody believes. I mean, monarchism? Seriously?

The real reason leftists don't bother finding out what the right believes is because to them, the right are The Other. This is an outstanding essay that really hits the nail on the head. Written by a leftist, so it's safe.