No Muslims Today have not been allowed to enter Makkah because of the interpretation that the majority of the schools of thought have given the verse in chapter 9 where Allah says that the Mushrikun, the polices are idol worshippers and are not allowed to come to this mosque after the 9th of hijrah at the time of the Prophet peace be upon him. The Malikhi, Shafi and the Humbari generally view that this verse has prohibited all non-Muslims from coming to Haram of Makkah. However, looking at the context of the verse, Ibn Qathir when discussing this verse says that it excluded Ahla-Dimma in other words, those non-Muslims who had already got peace treaties, it only prohibited them from coming for prayers for their own idol worshipping in the Haram of Makkah. And so for the Hanafi scholars, the Hanafi is viewed that verse of the Quran as only prohibiting non-Muslims from coming to pray. That is if you look at the context of the verse, it didn't prohibit others from visiting, they were still non-Muslim and policy slaves in Makkah at that time and even later and they were non-Muslim graves and burial sites in Makkah even after the revelation of this verse. The understanding therefore of the Hanafi scholars is that this verse only prohibited coming to worship there. It did not apply to Ahla-L-Kitab or people who had peace treaties with non-Muslims. However, since the Malikhi, Shafi and Hanafi, sorry, and the Humbari schools of thought, considered prohibited for all non-Muslims to come into the Haram of Makkah, the authorities have tended to side with the majority there. But that is just an interpretation of some scholars. It is not a consensus among the scholars that non-Muslims cannot visit the Haram or the sacred mosque of Makkah or Medina.