The Ruling on a Disbeliever Entering the Mosque

Question:
May Allah reward you. This questioner says: A disbeliever said to me, “I want to enter the mosque to see how the Muslims pray.” Do we allow him to do so as a means of calling him to Islam?

Answer:
What does he say? He says: A disbeliever said to me, “I want to enter a mosque to see how the Muslims pray.” Do we allow him? There is no harm. Even if he enters for a need or for technical work, such as electricity or something to repair, there is no harm. The disbelievers entered the mosque of the Messenger of Allah (peace and blessings be upon him), and Thumamah ibn Uthal was tied up in the mosque for days before he embraced Islam. There is no harm. Yes.
To complete the answer: except for al-Masjid al-Haram. Al-Masjid al-Haram does not allow disbelievers to enter it or the surrounding sacred precinct. Allah the Exalted said: . They do not enter at the Ka'bah, nor do they enter within the boundaries of the sacred precinct and the miles around it. Yes, this is the case. As for the other mosques, they entered the mosque of the Messenger of Allah (peace and blessings be upon him).