Socialism is absolutely restrained to Marxism. That's how it was invented, why it exists. It's an economic theory arising from his works. That's like saying, 'I know y'all say the sky is blue, but it's really red. Jews just corrupted the term red and associated it with blood, but I personally think the true association is with fluid, so it's the color of water too. So the sky is red, according to me.' He's completely redefining a term because he doesn't like who uses it and how popular it is. If I start calling my phone 'hotdog' because I think hotdogs are gross and am 'Taking the term back!', that doesn't mean my phone is actually a hotdog.