Roommate and TNR superstar Spencer Ackerman describes the Other Vietnam Syndrome:

It's true enough that, for more than 30 years, the left has not infrequently suffered from "Vietnam syndrome"--the assumption that any military engagement will be a moral disaster and a potential quagmire. But, though it has been less examined, the lesson the right took from Vietnam--that the true danger to national security is not misguided wars, but overzealous opposition to misguided wars--is, if anything, more dangerous. Call it the Other Vietnam Syndrome.

Read the whole thing, as the kids say. I actually think there's also a third Vietnam Syndrome, but that's a story for another day.