This quote means... Sort of like... Let's say I look at a person. He has a broken leg, an eye patch and is deaf. You don't expect much of him right? But then he does something awesome and you're like 'a person with so much disabilities couldn't have done that'. So this quote is basically saying ' Don't expect too little of a person from the first look'.
No, almost everyone hated it. The Vietnam war was probably one of the most hated wars in the eyes of American civilians. It is what started to Hippy generation.
