Chomsky has always taken the anti-American side on any conflict America has been involved in. That is why he's "edgy". He's an American living in America always blaming America for everything.
Good job in picking your sample size.
US pessimism might be on the rise -- but almost never about foreign policy. Almost always about tax-rates/individual liberties/opportunities/children . things that affect people here and now, not the people from distant lands with ways unlike our own.