Well, can it happen again ? ...
It has happened again. Once again, ignorant people such as yourself have been convinced of an alternative version of reality, in which the Nazis were socialists, hence giving the actual Nazis a good excuse to continue their work wiping out the left.
I'm sorry if that was a bit rude, but I have a zero tolerance level for bullshit, and the only people who have ever claimed the Nazis were socialists were the fucking Nazis. If you want to get your information from the Nazis then you can hardly blame me for thinking you are ignorant and stupid.
"Why," I asked Hitler, "do you call yourself a National Socialist, since your party programme is the very antithesis of that commonly accredited to socialism?"
"Socialism," he retorted, putting down his cup of tea, pugnaciously, "is the science of dealing with the common weal. Communism is not Socialism. Marxism is not Socialism. The Marxians have stolen the term and confused its meaning. I shall take Socialism away from the Socialists."