What is the ruling regarding a journalist who works for a channel that denounces Islam as kufr, incites against Muslims, glorifies the Crusades, and who refused to leave it after being warned?

It is forbidden to work in an institution that fights Islam and Muslims and serves polytheism, because it entails aiding in sin and aggression. Allah Almighty says: "And cooperate in righteousness and piety, but do not cooperate in sin and aggression." It is obligatory to advise and warn anyone who works there, and if they persist in working, then it is obligatory to repeatedly forbid them and pray for their guidance. As for physical punishments, only those in authority can carry them out, and it is not permissible for individuals to do so because of the corruption that would result from it.