What is the ruling of the Sharia on a doctor who offers advice in his radio program that contradicts religion, such as considering homosexuality natural or that sexual intercourse during menstruation is harmless, and is he permitted to do so?

For a concise, scientific, and medical response regarding the absence of harm from spousal intercourse during menstruation, one can refer to the research "The Qur'anic Miracles in the Rulings of Menstruation and Post-natal Bleeding" by Dr. Muhammad Abd al-Latif Saad. For a Muslim, the texts of Islamic law suffice, which describe menstruation as a discomfort (adha) and command avoiding women during menstruation until they purify themselves. As for describing sexual perversion as natural, its falsehood is clear, and it is a consequence of following the path of criminals, fulfilling the words of Allah Almighty: "Or do you think that most of them hear or reason? They are only like cattle; nay, they are even farther astray in their way." (Quran 25:44) Islam has forbidden adultery despite its accordance with natural inclination, so how about sexual perversion?