As Muslims, what is incumbent upon us regarding the broadcasting by some groups on satellite channels of beliefs that include denying Quranic texts, such as the prohibition of polygyny, and who bears the sin of remaining silent about that?

It is not permissible for a Muslim who is capable of denouncing evil to remain silent in the face of falsehood being spread by people of falsehood. Rather, he must strive to refute this falsehood using all legitimate means, such as publishing articles that clarify the truth through media and the internet, asking scholars about what is unclear to him, and frequently asking Allah for guidance for himself and his Ummah; as the Prophet, peace and blessings be upon him, said: "Whoever strives against them with his hand is a believer, and whoever strives against them with his tongue is a believer, and whoever strives against them with his heart is a believer. And beyond that, there is not a mustard seed's weight of faith."