Zizek

If you're interested in the question of tolerance, an interesting recent treatment of it can be found in Slovenian thinker Slavoj Zizek's Violence (Amazon). In many respects, Zizek can be considered a contemporary heir of Critical Theory. He combines reflections on pop culture (esp. film), Hegel, and psychoanalysis (particularly Lacan) in an entertaining and readable way. This book especially is meant for a more general audience than some of his other work. Ch. 4 is entitled "Antinomies of Tolerant Reason" and Ch. 5 "Tolerance as an Ideological Category." Let me know if you want to take a look at the book.