Why is it forbidden for non-Muslims to enter the Kaaba, despite some believing it belongs to all religions?

Allah has forbidden disbelievers from entering the Sacred Mosque due to the impurity of their beliefs. They do not have the right to enter the holy sanctuary. As for the claim that the Kaaba belongs to all religions, this was true before its distortion and abrogation with the advent of Muhammad, peace and blessings be upon him. However, after that, no one has a right to it except those who adhere to Islam, for it is the true religion that Allah has approved for His servants. "And whoever desires a religion other than Islam, it will never be accepted from him, and in the Hereafter, he will be among the losers."