Have you read Sam Harris's post on the dialogue? With Chomsky's permission he posted both sides, and Chomsky does come across as overly rabid:
I would put that to an 87 year old academic who's vast library jammed in his head makes discourse with Sam (who I've listened to his podcast and doesn't typically source arguments and occasionally comes across as an ideologue) a little frustrating. Or maybe he's just old and crotchety.