What golden age do these angry anonymous dudes want to go back to? Marvel was founded on left-leaning stories and Modern Marvel was launched by the obviously progressive commentary of Civil War. If they weren't offended then, it's because they were either 1) too young to understand, or 2) were better readers able to enjoy stories that weren't 100% aligned with their own views.

The culture across the board has been really divisive and angry at all levels in recent times. People are a lot less willing to agree to disagree, to live and let live, or to just relax and let things go. And that’s on all sides, even for my own part, I find myself with the desire to be able to make simple proclamations rather than nuance–”All people who think X are jerks!” But I know it’s not true, and I try to temper that part of myself as much as possible.