The Nazis were born out of a trades union, opposed big business, had generally collectivist rhetoric, and used the name "Socialist". All of these seem pretty left wing.
On the other hand, they're the textbook definition of a racist ideology, and we tend to consider that to mean one is extremely right wing.
In what sense were the Nazis right wingers?
In just about every relevant sense. We've got an FAQ section on this specific question (How Socialist Was National Socialism, if your browser doesn't take you there immediately), with answers from u/kieslowskifan, u/g0dwinslawyer, and u/sergey_romanov.