"It’s just you have seen the words “National Socialism” and assumed that meant left."
No, I just happen to live in an area (in germany) with lots of nazis and had to engage with their ideology a lot.
There definitely exist anticapitalist, socialist fascist today, as did back then. Those are the ones, that were put down in Nazi germany in 1934 in the Röhm Putsch, so they did not rose to power, but nevertheless exist.
They do believe in a socialist aryan society. So the greater good and negating of the individual, but limited to a certain race.
So how do they fit in, in the left = altruistic, right = selfish metric?
They are not individualists. They are willing to sacrifice themself for Volk und Vaterland.
"There are not contradicting views"
And with contradicting I meant in general. The socialist pagan Nazis do not really agree with the capitalist, catholic fascist of spain for example, but both are labeld right.
While anarchosyndicalist do not really share much with stalinist, yet both are labeled left.