Nah I don't think any honest reasonable person is going to turn into a nazi. But more likely, some lunatic is going to attack someone, that person will defend themselves, and then they will subsequently be labeled as a nazi.
Socialism is the pipe dream that everything works out honky-dory if everyone just shared and all manner of social welfare largesse was footed by the rich and the middle class.
Fascism is the end result of socialism when all those ideas don't actually work out, so the people must be pilfered and silenced at gunpoint.
