By employing people, if you mean paid $5 on Fiverr for two people to hold a sign that said something controversial as a joke for one time, yeah let's call that employing people.
I see people say worse on the regular, not as a joke, and these people get no where close to the shit piewdiepie gets.
Also, he did apologize that the joke went too far. He didn't think they'd actually do it. No, making a joke doesn't mean he's antisemitic.
And no I didn't memoryhole anything. I only found out piewdiepie after his Linux journey. Not everyone can be chronically online and/or are from a western country.
I didn't do my research, so I'd rather you explain yours to me. I'm willing to hear you out.