For many progressives I know, those things are blamed indeed, but for society's problems, not their own. There's a real difference there, deriving from the difference in political philosophy. Broadly speaking, the left believes that if you address structural social issues, individuals will eventually have paths to succeed. The right believes that if everyone focuses on the problems they themselves experience, society will eventually improve. Either ethic can be applied in the extreme with disastrous results.

> ...those things are blamed indeed, but for society's problems, not their own.

That's a good point in some cases. But in many cases that doesn't hold. Meryl Streep outgrouped popular, middle American, and "lowbrow" culture(s) when ranting about how they impact on her job. Gay marriage and abortion views are certainly personal complaints as well as social ones. Distaste for spiritual people typically stems from a personal grudge more than a dry academic philosophy about the social impact of disagreements about metaphysical reality or something. How about bikes versus cars disputes in urban areas? Or disagreements about Bay Area rent?

I can come up with more examples. I think there's a "I'm just being the rational one here" type of cognitive dissonance from basically all perspectives. Even that attitude holds the seeds for outgrouping (those irrational people!).