He doesn’t know any better so who’s teaching him this
I think it says less about Kim and more about the YouTube algorithm. He probably watches gaming content or similar content and those spaces are filled with right wing people. You then get recommended videos based on what you've watched and that's probably going to be more right wing content. It's the reason you see a lot of young boys turning into right wing women hating losers so early in life. They're being groomed by conservative imagery.