Legality of the holocaust

by NatureCalls611

Was the Holocaust legal in the reich or was it illegal almost like some sort of black operation that could be deemed illegal in court.

Another question but sort of on the same topic, did Hitler have total power or were there like some sort of senate or congress that needed to approve all the decisions and laws before they were implemented.

Forgive me if my question is hard to understand English is not my first language

voyeur324