What it's really all about and why history matters:
". . . the doctrine that America, as the lone Western superpower, represented the evil nature of colonialism and capitalism's exploitation of the masses -- whether there was any truth in this assertion or that the United States was guilty of these sins was irrelevant. The material and military success of America and the West could only have come about from expropriating the wealth and labor of the peoples of the world . . . However to the Marxist mindset of the radical left, only they, utilizing the vehicle of a massive central government, could control mankind's nature and create a fair society. It is the ideal philosophy for those who, so enamored with themselves, can wallow in their self-importance and rule with a heavy hand the same masses they claim to protect. Under no circumstances, therefore, can these revolutionaries defend or profess admiration for their country; instead they must not only transform the United States into a villain, but destroy any vestiges of its accomplishments in order to permanently retain control over the populace and exact revenge for the alleged transgressions of the West."