OK I will re-phrase that to "one of the main reasons" since for the meat to be considered halal it needs to fulfill two main requirements. Firstly it must be slaughtered by the name of one God and secondly it must be slaughtered with proper procedures. For most religions, the practices are always come down to spiritual and physical aspects, and as you probably can deduce that the first one is the spiritual aspect of it.
Having said that, Quran refer to the Jews and Christians as "People of the Book"[1], and that's the main reason some of their rulings are acceptable in Islam. Another fun fact is that "Moses" is mentioned by name more than any other prophet names including "Muhammad" inside the Quran [2][3], and there is also one Chapter "Mary" referring to the Jesus' mother.
[1]https://en.wikipedia.org/wiki/People_of_the_Book
[2]https://en.wikipedia.org/wiki/Moses_in_Islam
[3]https://en.wikipedia.org/wiki/Prophets_and_messengers_in_Isl...