From the differences between Makkah and Madeenah

Reference: Taqyeed ash-Shawaarid min – Page 301

It is permissible for a disbeliever to enter Madeenah based upon the evidence that when Thumaamah ibn Athaal took the horses of the companions, they brought him [back] and tied him to one of the pillars of the Masjid [an-Nabawee]. In contrast, the disbeliever is not permitted to enter Makkah, because of the statement of Allaah (Subhaanahu wa Ta’aala):

{O you who believe! Verily, the polytheists are impure. So let them not come near al-Masjid al-Haraam after this year}, soorah at-Towbah, aayah 28

The scholars have even said that if a delegation of the disbelievers came to see the leader of the Muslims whilst he was in Makkah, then they are not to enter Makkah, rather, he is to go out [of Makkah] to meet them. And this is from the differences between Makkah and Madeenah.

He is a graduate of the Islaamic University of Madeenah, having graduated from the Institute of Arabic Language, and later the Faculty of Sharee'ah in 2004. He currently resides in Birmingham, UK.