"Hey genius maybe you need to Google Adolf Hitler and while you're at it get rid of that Confederate flag the South lost it's time to move on"
Mentioning Hitler (even to condemn him) is a violation of Facebook's "Community Standards on dangerous individuals and organizations" due to "offline harm".
This is a great example of why you should never mention Hitler on Facebook - even many non-political pages use the euphemisms "An Austrian Painter" or "The Austrian Painter".