An excellent article, but it leaves out the main point.....
By the 1960's, Marxists understood that Marxism would never take hold in the Western world, so they had to demonize the West. If Western Europe and America had embraced Marxism, this wouldn't be necessary.
Moral relativism is a reaction to the fact that in terms of practical application, Marxism is a failure. But the true believers keep believing, and in order to believe, they had to create moral relativism, which basically says that the evil White Westerner is too greedy and corrupt to accept Marxism, so therefore, he must be destroyed.
The problem is that if you talk to most people about the threat posed by Marxists they'll say "aw c'mon, Marxism will never prevail". What they don't understand is that it doesn't matter if Marxism never prevails. What matters is that Marxists are working very hard to make Westerners so cynical and blase about our culture and way of life that we won't have the will to defend ourselves against anyone.
And the true believers joined in an alliance with those who share their goals, the islamofascists.