Belief of Nasrani Christians

What were the beliefs of the Syriac Christians in Arabia at the time of the Islamic prophet? I have heard that these [Nazarene Christians](https://en.wikipedia.org/wiki/Nazarene_(sect)) (Christians of the city of [Najran](https://en.wikipedia.org/wiki/Najran)) did not believe that Jesus was crucified similar to the Muslims. That claim was made by a Christian apologist, but I do not get the angle as the Qur'an clearly mentions that there are Christians who believe that Jesus was crucified as it says about the crucifixion: "it was made to appear to them"