I love John Milton's poetry. It's a shame it isn't better known.
You know, I think it's more a simple case of "enemy of my enemy" thinking. But that's just me.
One thing this implies is that every single doctrinaire Leftist believes very much in his or her right to dictate the direction of the collective by virtue of superior intelligence, an ubermensch over the masses. The self-described defenders of the masses are, to an individual, elitist to the core and horrified by the thought that they might be considered one of the masses.
The principle is that a certain set of political beliefs allows the individual to transcend his or own own culture in the belief in Something Greater - not, of course God, He has been replaced by the State. This transcendence is absolutely the core of Multiculturalism, in which the believers hold themselves above their native culture and in judgment of all. Milton would have recognized this form of transcendence in a second, and the author is right to quote him on the topic. "And ye shall be as gods" is the first of all lies, and if Nietszche and Marx repeated it they had a far older teacher. That is the lie that drives the Left.
The image of Rosie O'donell being tossed or maybe just rolled into the lake of fire is a bit amusing, especially the ensuing hissing and spattering.