I think a very good case can be made that sub-consciously many if not most have such enormous feelings of white guilt that at least at a sub-conscious level they have been convinced that America must be fundamentally changed....a radical change, a change that would mean the end of America as a super-power.
Which would create a huge vacumn that some of our adversaries would rush in to fill --like a raging storm.
The net result of that would be America reduced to a vassall state paying homage to the New Superpower.
I could see maybe something like this applying to a broader context. The West overall seems largely intent on transforming itself into a multicultural array of countries that constantly apologizes for past ills, but the focus is rather ahistorical.
Not much is different about European colonialism as compared to conquests by other powers beyond the technology used. Europeans were oftentimes more effective at colonialism and empire than other powers just because of the tools available at the time. If the Mongols had instead developed guns and better transportation, most of us would be speaking Mongolian instead.
That being said, I'm not sure if having America less involved in foreign affairs is a bad thing. The last 20 years of our activity have been pretty bad for the Middle East.