I don't understand what you're getting riled up about. It's obvious that the old ideas in question are meant to have been superseded or flat-out debunked (for example, the idea that black men can't marry white women is old in this sense, as is COBOL in this sense). I don't get mad that "green" (comes from young plants) is used to mean "inexperienced and unskillful." As long as they realize that doesn't mean any particular young person is that way, I don't see a problem worth getting mad over.