Quinnipiac Professor Matthew Loter allegedly attacked a YouTuber last week during the “Gen Con” gaming convention because he had criticized “social justice” online.

Quinnipiac University gaming professor Matthew Loter allegedly assaulted a YouTube personality last week over online criticisms of Anita Sarkeesian and the social justice movement in general. The alleged victim, YouTuber Jeremy Hambly, ignited Loter’s ire by posting a video in which he criticized the decision to host Sarkeesian at the Gen Con gaming convention in Indianapolis.

In a tweet, Loter had said that he would “fight” anyone that criticized the decision to invite Sarkeesian to the conference. “Real talk: if you have a problem with [Anita Sarkeesian] being invited to @GenCon fucking fight me. I’m easy to find,” Loter wrote on June 5. Loter has since deleted his Twitter account.

In a comment to Campus Reform’s Toni Airaksinen, Hambly said that outside of a local bar, Loter first asked his name to confirm his identity, then put him in a headlock and began screaming and punching him. “At that moment, I sincerely thought it was a fan from YouTube. And then I turned my head and Loter started screaming and punching me, yelling ‘I’m going to f***ing kill you,” Hambly explained. “It took four people to pry him off… then he punched a window and ran off.”

Hambly has shared photos and videos of bruises, cuts, and an eye injury that were allegedly the result of the attack by Loter, which Hambly calls “politically motivated.”