It "rhymes" more than "repeats", if you ask me. But yes, there is an alarming tendency for humanity's collective memory to "reset" every few generations — and thus, for later generations to either roundly ignore or draw all the wrong conclusions from their forebears' mistakes.
Upon reflection, I wouldn't rule out the next generation of blood-soaked monsters learning all the wrong lessons from Hitler's example, in much the same way that Lenin, Stalin, Mao, and other Communist revolutionaries revered and consciously emulated Robespierre and the Reign of Terror... before taking the blood purges, purity-spiraling, and social engineering to whole new extremes. Seen in that light, I think Hitler and the Nazis' shadow will still loom large
over future genocidaires, especially when things get so bad, that they decide "Whatever Globalists hate must be good. Globalists really hate Hitler — so therefore, Hitler good!" and take that to its logical conclusion.