Polish authorities arrested American tourist Jon Minadeo Jr. for violating the country’s hate speech laws after the Holocaust denier demonstrated in front of the Auschwitz-Birkenau extermination and concentration camp. He was released shortly after. His arrest represents the first time the antisemitic influencer has publicly faced legal repercussions for spreading antisemitic propaganda. Unlike the US, Poland criminalizes certain forms of hate speech, and the country’s laws refer to Nazism and fascism specifically. At home, in addition to hosting near-daily livestreams for 4,200 followers on his website Goyim TV, Minadeo engages in what he calls “activism”: hanging antisemitic banners on highway...