The bishop was not popular
This went on for nearly 25 years, but the bishop always came back.
So they killed him.
Just as they had killed his old friend, the bishop who had sent him to that city.
Just as they had killed the one who had personally sent his old friend: the Lord Jesus Christ.
The memory of St. Apollinaris - martyr, bishop of Ravenna, and friend of St. Peter the Apostle - is celebrated on this day.
(from an earlier post)