Questions on the Explanation of the Book of Nullifiers of Islam

Question:
Some people issue a fatwa (scholarly legal ruling) to kill the disbelievers who are in the Arabian Peninsula, and they justify this by saying that they are not under a treaty; because their state kills Muslims in the name of terrorism. Is this fatwa valid?

Answer:
This is also from the fatwas of the ignorant and those who pretend to be scholars. It is not permissible to kill disbelievers who came with a covenant and safe conduct, entering the lands of the Muslims with a covenant and safe conduct from the Muslims. This is treachery and betrayal, and it is not permissible, even if they are in the Arabian Peninsula. It is permissible for them to enter the Arabian Peninsula for the benefit of Muslims, whether as ambassadors, traders, or workers who perform tasks that no one else can do well. What is forbidden is settlement; it is forbidden to allow disbelievers to settle in the Arabian Peninsula. As for their entering the Peninsula for trade and dealing and then leaving, there is no objection to that.