The Shaykh gave examples of Muslims being influenced by disbelievers when they mix with them, and the resulting doctrinal and moral corruption.

The Shaykh : For example, regarding what the professor mentioned, we recently read in some bulletins or magazines—our brothers mention more than I do, which is the important point—that Muslims in the West Bank, who belong to the Hamas group, saw a bulletin calling Muslims to celebrate the festival of their Christian brothers. I think some of our brothers present here remember this!
The student : I, my Shaykh, I brought you this statement.

The Shaykh : And these are Muslims, meaning fundamentalists as they say today, and a father and grandfather were somewhat influenced by the current conditions. So what about those who live in those countries?! There is no doubt that what the professor pointed out will be realized; they will be assimilated into that deviant society, not only regarding the oneness of Allah but also regarding morals, even Christian morals. Because if the morals of Muslims change, except for those whom Allah wills, and they are few, then it is even more likely that the morals of Christians will change from their own. We clearly remember that in our country, first: there were two quarters, meaning two neighborhoods, the Jewish quarter and the Christian quarter. This was an arrangement, either intentionally by the Muslim rulers, or unintentionally, but it was the general Islamic guidance for Muslim individuals: not to live with disbelievers and polytheists, and consequently, they do not live with Muslims. So the Jewish quarter was separate, and the Christian quarter was separate. Nevertheless, we saw, and I witnessed this: a Christian woman could hardly be distinguished from a Muslim woman in her covering; she wore the black abaya and covered her entire body except her face. But today, Muslim women have abandoned this attire, let alone the disbelieving Christian women. Therefore, we must know the environment for what it truly is, without doubt or hesitation. The environment that is materially corrupt also influences materially, so the environment that is spiritually corrupt also influences spiritually. Hence came his saying (peace and blessings be upon him): , meaning: he gives it to you for free the blacksmith, . So the one who associates with people, if they are righteous, he is influenced by their righteousness; if they are wicked, he is influenced by their wickedness. This is inevitable. Therefore, we say, supporting the Islamic position, that a Muslim should live among righteous people. Please, when the parliament in a Muslim state is not established on the basis of the Book and the Sunnah, and most of its members do not revolve around the Book and the Sunnah, but rather do not revolve around anything of Islam, but only law and order, then these Islamists who enter the parliament will be influenced and will not influence. Reality supports this. And all of this is from the wisdom of the Prophet’s guidance to Muslims in such a hadith, and there are many hadiths in this meaning: . So when a Muslim lives in the lands of disbelief, who does he associate with? Who does he eat with? Those disbelievers, those Christians, and so on. Therefore, it is not permissible—may Allah bless you—for a Muslim to get involved and travel, and I do not say migrate, to the lands of disbelief. Rather, it is the disbelievers who should migrate to the lands of Islam. It seems you want us to move?!
The student : No, not just that.