You really have to have red-white-and-blue blinkers on (likely manufactured in China) to be so afraid of socialism.
You have to understand, the current definition of 'socialism' in the United States, certainly the one that this fine fellow uses, is 'every kind of thing that is bad in any kind of system of government'. And so they lump together Obama (middle-right technocratic, by any historical standard) with Hitler (extreme right, but hey he called it 'national socialism' so it must be socialist right?), Stalin (mostly extreme left-wing, except for some right-wing elements he brought in), everything the American right-wing hates about Europe, China (which is no longer recognizably left-wing at all), and so forth.
You won't convince him of anything, because that really is the current definition here, so he has plenty of material to 'prove' it. It's sort of entertaining to watch, if you can get past the nausea.