Three youths attacked University of Macedonia professor Nikos Marantzidis in Thessaloniki on Tuesday.
Marantzidis, also an author, was with a student at a local cafe when three young men approached him and voiced their objections to the professor writing articles criticizing the left.
According to Marantzidis, he responded by saying he was willing to discuss the matter with the three men but one of them punched him in the head and the other two kicked him when he fell to the ground.
The three assailants ran off and Marantzidis was taken to the hospital for treatment.