What is the ruling on residing among the polytheists, and if a teacher is asked to go and reside in the lands of disbelief to teach in institutes, should he accept?

The questioner : In the name of Allah, the Most Gracious, the Most Merciful.
His EminenceThe Shaykh : The Messenger of Allah (peace and blessings be upon him) said: And now we find hundreds of thousands of Muslims residing among the polytheists, and benefactors have gone and built Islamic institutes there in order to teach the children of Muslims first, and to call people to Allah second. So, if a teacher is asked to go and reside there to teach or to call people to Allah, is it permissible for him to accept while residing among the polytheists?

The Shaykh : Praise be to Allah, Lord of the worlds, and may Allah send prayers and peace upon our Prophet Muhammad, and upon his family and his Companions, and upon those who follow them with excellence until the Day of Judgment.
Residing among the polytheists is undoubtedly a harm, and a person exposes himself to trial and evil. However, if this trial or this evil leads to a greater good, such as going there to call people to the religion of Allah or to teach the children of Muslims the correct creed, then there is nothing wrong with it, because the public benefit here is stronger or greater than the expected harm. It is possible that the hadith can be interpreted to mean that it refers to one who is unable to manifest his religion, whereas one who is able to manifest his religion does not fall under the hadith. But it is better to take it in its general sense. He said that if his residence is more beneficial for the Muslims or for Islam and the Muslims, then there is no blame on him.