Nazi is just a name given to racists/nationalists with extra steps. They just hated jews and believed in pure race. If you don't teach about nazis in schools that hypothetical 5% will still be nazi like but not attached to strict nazi 'ruleset' and symbols, but we just can call them extremists. And it's not like people don't have access to internet, mein kampf can be found without much effort even if prohibited in many countries. And tbh teaching about nazi atrocities leads to 5% creation of nazis sounds like something pulled from air without proofs