re: "70s and 80s" has an exact meaning.
"As for the rest, it's a standard liberal assumption that the only possible reason we could be hated by anybody in the world is because we're doing something wrong."
It seems to be a standard conservative assumption that there must be a lot of other (foolish) reasons we (the US) are hated by anyone, because we never do anything wrong - all American activities, at home and abroad, are for the greater good of mankind (US first, of course).