Both Left and Right Wing extremists are ideological and prejudiced. To take it even further they are supremacist as well; the Right basing their prejudice on race. The left base their prejudice on 'the cause', the cause being the belief that Socialism can only do good, and is the only good for mankind; anyone against Socialism is against humanity, therefore 'right wing', therefore beneath contempt.
This erroneous belief and self-righteousness has led to a popularisation (once again) in society and a shift to far Left outlook; from being about supposed humanitarian concerns, or supposed benefits to all mankind, to being simply selective and reactionary. Reactionary against capitalism, selective in its outrage. This can therefore be categorised as post-Socialist.
This new stance has seen the Left begin to support the kind of ideologies which holds principles the Left itself claims to be against.
But actually this isn't anything new. It is quite a testament to delusions which still stand today, about the benign nature of Socialism, that people are not prejudiced against Socialism in the same way they are against fascism. The Communist regimes were responsible for almost 100 million deaths in the 20th century.
One could argue that these regimes did not adhere to the principles of Marxism, and were simply dictatorships using the guise of Socialism as a front.
Marx said that "In order for man to realize his potential and to lead a life befitting his true nature, he must find the means to rid himself of the shackles of alienation."
http://www.mmisi.org/ma/30_01/coby.pdf (PDF File)
This isn't an essay about Socialist or Marxist theory. But from the above quote, we can gauge that 'alienation' is a bad thing (without getting into what alienation actually means) and alienation is the obstacle Marx saw to attaining a 'perfect' society. But the quote from Marx contains a clause, it states that in order to get to this ideal, man must rid himself of these shackles. So by Marx's very teachings, we see that 'Socialist Regime' is a contradiction in terms. For when a centralised regime attempts to rid its people of these shackles - such as we saw in Cambodia - it becomes theft. It becomes a raping and pillaging of society.
In Cambodia, children were separated from parents in order that they not learn the 'corrupt knowledge' handed down from generation to generation; and the Cambodians were moved from towns and cities into the countryside. Also too was the Cambodian currency which was abolished. Anyone who did not obey orders was executed on the spot. Anyone hiding food to give to their loved ones was at risk of death. In this sense, it was a form of sin to feed oneself instead of giving to the regime; the higher cause.
This brings us back to the opening statement about the totalitarianism of Socialists and are just as capable of eliminating anyone not willing to die for the ideology. In a more realistic world socialism is simply another form of fascism.
In Western societies we have a direct relation to Cambodia with a similar process underway, since the 'Radical '60s', to lead us once again to this totalitarianism. The Cambodian example is just political correctness, but much further down the line.