We see in the Gulf countries that some Christians and Hindus are building churches and temples; is it permissible to leave them to do so?

The questioner : The questioner says: May the Shaykh please tell us, we see in the Gulf countries that Christians and Hindus are building churches and temples, and they are carrying out their religious activities. Is it permissible for two religions—meaning two faiths—to exist on the land of the Gulf states in the Arabian Peninsula?

The Shaykh : Of course, the scholars are in agreement that it is not permissible to build churches in Islamic lands. However, they do not prevent those who are devoted to a religion other than Islam from continuing to hold fast to their religion. This is based on the saying of Allah (Mighty and Majestic): ; therefore, establishing non-Islamic houses of worship, such as building churches and other temples in Islamic countries, is undoubtedly a violation of the Shari'ah. And it is not the first violation—regrettably—to be found in Islamic countries. As for compelling people to leave their religion, that is not of Islam in any way; .
So the question should be divided into two parts:
The first part is the building of non-Islamic temples in Islamic countries; this is not permissible. The early Muslims, when they were conquering the lands of non-Muslim disbelievers, if they conquered them by treaty, they left them, their temples, and their religion. But if they conquered them by force, they did not allow them to renew the building of a church, a temple, or any place where they worship Allah in their own way. A covenant was taken from them, and conditions were placed in the treaty of peace between the Muslims and those peoples. So it is even more obvious that it is not permissible for disbelievers to build temples and churches for themselves in the lands of Muslims. This is one side of the question.
The second side is that these people are left to their religion and they worship their Lord as they see fit, without being compelled to adopt Islam as their religion. But this does not mean that Islam is not to be conveyed to them. It is necessary to convey Islam, but that is not accompanied by imposing Islam or forcing people to accept Islam. This is the second thing in the question.
As for the Arabian land, about which the hadiths came explaining that two religions do not coexist in the land of the Arabs, what is in my mind is that the intended meaning of "the land of the Arabs" here is not all the known Arab lands of that time, but rather some of them, such as Makkah, for example, and others. Otherwise, we know that Christians were living, and still live, in the Arab lands without being forced or compelled to leave them, except if they violate the conditions of the treaty. In that case, Islam obligates the Muslim rulers to expel them from their homes.
Other than that?