National Socialism is a very good system especially economically. I think if Israel was a National Socialist state for Jews it would be one of the most powerful states. Jews could really use policies like Lebensraum.
Socialism is a disaster. Socialism is the reason why Israel is not able to unleash the power of its economy like it should be able to. In the short run, in order to radically increase production, socialism works, but it's only useful as an artificial boost to an economy, it's not efficient in the long run. Free market capitalism is the most efficient permanent market system, the only reason socialism is needed is for emergencies or large scale market failures where the market cannot correct itself.
National Socialism is only called "Socialist" to get the support of the Working people. In Weimar Germany they were under attack from communists who had a lot of support. It is only called that for strategic purposes. It was closer to Mussolinis Fascism than to Socialism.
Yes, but the economy was still socialist. There was still heavy state involvement in the economy, that's called state socialism. It wasn't a free-market system.