Why not? He’s being publicly attacked.
He asked for it! If you don’t like what your employer is doing, remove yourself!
And if you’re involved in a spectator sport which counts many Catholics as fans, you’re nuts to go about declaring that Catholicism is a ‘false religion’.
I don’t know if he’s just stupid or has a screw loose; but when someone is paying you to do a job, you play by their rules or you leave.