You just don't get it, you're too busy trying to feel superior to both sides to see what is actually happening. Maybe you're trolling, or maybe you're just ignorant. I'll write this up assuming the latter, so that you or anybody who agrees with you (or doesn't agree, but can't really put their finger on why) understands our position. This also highlights why the horseshoe theory is horseshit.

Nazi Germany was a fascist regime that put the power into the hands of a dictator and a small cabal of capitalists that owned the means of production. The state bought arms and armaments from these factories in preparation for war. The war economy is a basic tenet of fascism - the state needs a steady stream of military equipment for the wars that it needs to fight. To pay for these military goods, the state needs to attack, occupy and then exploit other countries. Military spending drives a fascist economy, creating jobs and demand for consumer goods. It's just a bubble, based on imperialist wars of exploitation, as soon as that military spending stops, millions of people lose their jobs and the economy tanks.

To justify such barbarism to the people, who have lost their rights to organise or negotiate, the dictator uses rhetoric about the perceived superiority of their nation and, in some cases, about how the dominant race is superior to other, minority, races. They paint a scapegoat (Jews, slavs, blacks, muslims, socialists) as a threat to their way of life, dehumanise them, play on peoples fears, and then expropriate the wealth from those groups and exterminate or repress them. They justify wars by using propaganda to create an enemy or exaggerate the threat of an existing enemy, and then invade Iraq use that as an excuse to pre-emptively attack said enemy. This constant paranoia justifies the insane military spending required to support the war economy bubble.

Fascist regimes also, as we all know, violently and systematically repress all perceived opposition. They stifle freedom of the press, freedom of speech and almost all civil liberties. A very, very dangerous ideology indeed, one that cannot be allowed to flourish due to the threat to humanity it poses.

Socialism, on the other hand, is an ideology that promotes equal rights for all and public ownership of the means of production. Socialism promotes internationalism, unity of the people and harmony with the environment. Socialists do not believe that the weak are to be ruled over by the strong. Socialists believe that everybody should have the opportunity to contribute to society in their own way, without being exploited and without needing to exploit others. These were the founding principles of the Russian Revolution and these are the principles of all modern socialists.

To compare the Soviet Union to Nazi Germany is disingenuous, even when Stalin had the helm. Strip aside the western propaganda, and the Soviet Union was rather progressive (women had full equality under the law, for example). It held elections, offered free housing, schooling and medical care and did not have an economy based on war.

Don't get me wrong though, in my opinion, the Soviet Union had some serious issues; the ridiculous bureaucracy, questionable economic policies (see: corn), use of cruel and unusual punishment and, probably the worst of all, mismanagement of collectivist farms in Ukraine. However, socialism is not solely represented by the actions of the USSR. There are many, many socialists who are not happy with the direction the USSR took. Those socialists still use the hammer and sickle, they still label themselves socialists or communists and they still wave red flags. Socialism is not a threat to anybody except the bourgeoisie, and those who support them.