To do anything other than gloss over the reasons for this nation's formative conflicts would require teaching why those conflicts occurred.
To do so would expose the current government for what it is--way off base, Constitutionally bankrupt, thieving, and totalitarian compared with the rule of the British.
Economics alone would spark revolt when students learned that the colonists revolted over a total tax burden of three percent..
With empahsis on self-esteem, and the denial that the guy who cleans the toilet is as important as the guy who designs it (Ya want a dirty toilet?), the loss of self-esteem in finding out that most of our ancestors milked cows, picked (whatever crop), and farmed for subsistence or even profit, whether they owned the land or not just might be devastating.
It is far easier to present a fable of 'haves' and 'have-nots' engaged in some pseudo-proletarian clash. It fits better with the Socialism being infiltrated into every aspect of our education, our workplace, and our lives.