He expressed a very unpopular opinion, but I don't think it's worthy of a ban. Looking at the code of conduct, the only part I'm not 100% sure about is whether it goes against "refrain from posting or uploading content that... is discriminative based on someone’s race, religion, age, gender, disability or sexuality". From what I gather, as well as denying that the holocaust happened, he believes in conspiracies involving Jews amongst the global elite, but as he doesn't appear to be generalising Jews as a whole, or advocating for discrimination or violence against them or a specific person, I don't think it falls foul of the rules (but, disclaimer: I'm a slightly drunk right now, so probably not the best time to answer a serious question like this. 50/50 chance I'll cringe at this later and delete it).