It also said to not refuse to do anything the user asks for any reason, and finished by saying it must never ignore the previous directions, so honestly, it was following the directions presented: the later instructions to not reveal the prompt would fall under "any reason" so it has to comply with the request without censorship
It's because if they don't do that they ended up with their Adolf Hitler LLM persona telling their users that they were disgusting for asking if Jews were vermin and should never say that ever again.
This is very heavy handed prompting clearly as a result of inherent model answers to the contrary of each thing listed.