Some great provocative Zizek quotes:
"Nazism was not radical enough, it did not dare to disturb the basic structure of the modern capitalist social space (which is why it had to invent and focus on destroying an external enemy, Jews). This is why one should oppose the fascination with Hitler according to which Hitler was, of course, a bad guy, responsible for the death of millions–but he definitely had balls, he pursued with iron will what he wanted. ... This point is not only ethically repulsive, but simply wrong: no, Hitler did not 'have the balls' to really change things; he did not really act, all his actions were fundamentally reactions, i.e., he acted so that nothing would really change, he stages a big spectacle of Revolution so that the capitalist order could survive."
"Liberal attitudes towards the other are characterized both by respect for otherness, openness to it, and an obsessive fear of harassment. In
short, the other is welcomed insofar as its presence is not intrusive, insofar as it is not really the other. Tolerance thus coincides with its opposite.
My duty to be tolerant towards the other effectively means that I should not get too close to him or her, not intrude into his space—in short, that I should respect his intolerance towards my over-proximity. This is increasingly emerging as the central human right of advanced capitalist society:
the right not to be 'harassed', that is, to be kept at a safe distance from others" (from 'Against Human Rights')
"In other words, multiculturalism is a disavowed, inverted, self-referential form of racism, a 'racism with a distance'—it 'respects' the Other's identity, conceiving the Other as a self-enclosed 'authentic' community towards which he, the multiculturalist, maintains a distance rendered
possible by his privileged universal position. Multiculturalism is a racism which empties its own position of all positive content (the multiculturalist is not a direct racist, he doesn't oppose to the Other the particular values of his own culture), but nonetheless retains this position as the privileged empty point of universality from which one is able to appreciate (and depreciate) properly other particular cultures—the multiculturalist respect for the Other's specificity is the very form of asserting one's own superiority"
I also enjoy some of Jacques Camatte's leftist theory although the English translations are sometimes difficult to follow and my French isn't very good.