The statement makes much more sense for today's world if the "who" in the question "Who you can't criticize" is specific instead of broadly targeting a demographic. You won't get hunted down for saying "rich people are bad and should die", but if you start spewing facts with names and pointing fingers ("CIA is a terrorist organization, and this is why"), or e.g. in Greece you say "Marinakis is a drug dealer" publicly, you should start worrying for yourself.