Once someone claims the Nazis were leftist, they lose all credibility. Their name does not define them. They were reactionary conservatives, quite similar to current US conservatives except in the extremity of their views.
Yes, crack a history book, and you will see that conservatism does not lead to utopia, and that it in its extremes it leads to horrific outcomes.
How convenient to have a world view in which there is only an extreme left, but no extreme right? That is a laughably biased view to the point where it calls into question the validity of the holder’s other points as well.
People are indeed free in Norway, Sweden, Denmark and Iceland, and have been for decades. They also are way beyond the US in most metrics of quality of life despite not having the USA’s might and natural resources.