What is the ruling of Islamic law on one who insults Islam and the Noble Messenger and debases the Islamic creed?

Whoever mocks the religion or the Messenger (peace be upon him), or belittles the belief of Muslims knowingly and willingly, has committed an act of disbelief (kufr) and apostatized from Islam, even if he was joking. This is based on the Almighty's saying: "Say, 'Is it Allah and His verses and His Messenger that you were mocking?' Make no excuse; you have disbelieved after your belief." This website is full of slanders and raises doubts; it is a breeding ground for deviants. The conflict between truth and falsehood is a cosmic law, and the people of falsehood will not be satisfied until Muslims abandon their religion. This malicious scheme is evident in discussion forums based on slanders and false information. Most writers on these websites are either deniers of religion or negligent in it, and these forums have become a breeding ground for missionaries. The greatest sin falls upon the owner of the website and whoever made its platforms a breeding ground for every malicious person. It is necessary to abandon these websites unless one has the ability to refute their falsehoods and repel their slanders. What is said in these forums is not freedom of thought and expression; rather, it is freedom of disbelief and deception. Mocking belief or speaking about Allah without knowledge is not freedom.