Look: I've spent the better part of 30 years studying continental philosophy (and more specifically, the works of Derrida) and anyone who thinks that the field can be summarily dismissed by folks like Chomsky, Weinberg or Dawkins are sadly mistaken. Chomsky, Weinberg and Dawkins are all brilliant men in their own fields, but it takes some mighty big cojones, and a mighty parochial view of the world, if they think that this means that their judgments on matters outside their field are more important than any other amateur. And I'm sure they'd be the first to cry foul if some philosopher or other tried to dismiss their work on the basis of a few out-of-context quotes, without bothering to actually do the reading.
I'm not saying that the writers generally thought of as "post-modern" are above reproach; far from it. What I am saying is that if you want to attack them, for God's sakes read the texts.