That type of response may result more from lack of education than from political ideology. Where I live, there are a fair amount of educated liberals and conservatives. I run into liberals and conservatives alike who give a similar response to what you listed; I also run into liberals and conservatives alike who have wonderful conversations about politics without getting riled up. From my observations, there doesn't seem to be a correlation with political ideology.

I'm curious to know how frequently you have encountered one of your liberal friends debating with an educated conservative. Likewise, I'm curious to know how frequently you've encountered one of your conservative friends debating with an educated liberal. Over the past couple of years, I've run into a number of people who simply couldn't believe that an educated liberal/conservative existed, primarily because they grew up in an area where there weren't many people with differing political views. It's a dangerous trap to fall into, because it allows you to categorize the other political party based on only the rhetoric of elected officials and on the interpretation from media. I have yet to meet a conservative or progressive who matches the caricature of either portrayed by politicians or entertainers.

All the educated conservatives I’ve met have been pleasant people. It’s just that the far majority have not been educated (as opposed to liberals, which seem to be pretty much all educated, to the point where I feel education and liberalism might as well be the same thing :/).

Yeah, the reality is that "listening and respecting the opinions of people whom you disagree with" (or not) is an ideology in its own right.

One would hope that it'd be orthogonal to conservatism/liberalism or any other political spectrum, but I suspect it's not.

In some respects it is, it’s just correlated I’d say.