I disagree that left of center is more nuanced than communism. Most communists historically reject all forms of sectarianism, although we can fall into it anyway for a lot of reasons. I have love and admiration for many progressive liberals, and leftists that are not communists (commies are often not the most left faction, leninists tend to be more center left.) When you get to this level of analysis though, left right and center stop being useful and you have to dig into actual issues and political action.

But many progressive liberals are wrongheaded or idealist and dualist, which is not conducive to nuance. But also people are often much more deep and full of insight than their politics suggest