Is it permissible for a student of Islamic knowledge to refute the misconceptions of Christians on their websites and invite them to return to Islam, or is it better to leave that to someone more knowledgeable than him?

Calling to Allah and refuting the specious arguments of the skeptics is a religious obligation carried out by scholars, preachers, and students of sacred knowledge. It is a form of jihad in the path of Allah, for the Prophet, peace and blessings be upon him, said: "Strive against the polytheists with your wealth, your hands, and your tongues." A sound argument is more beneficial for supporting the religion than weapons. Indeed, the best of the Companions embraced Islam through the proofs of the truthfulness of Muhammad's prophethood, peace and blessings be upon him.