He has repeatedly made anti-semitic statements. It wasn't once or twice. What he posted and did is literally definition of hate speech.
Throw in repeated n word jokes and it makes him at the least sympathetic to white supremacist views and at worst a racist and anti-semite.
Did he? Two of the supposed anti-semitic videos are ones where he specifically parodies drama channels and the youtube heroes campaigns as nazis. He's calling other people nazis with it, not really engaging in actual nazi propaganda.