Ruling by the laws of Allah

أَيْ لِيَحْكُم أَهْل الْإِنْجِيل أَيْ فِي ذَلِكَ الْوَقْت , فَأَمَّا الْآن فَهُوَ مَنْسُوخ , وَقِيلَ : هَذَا أَمْر لِلنَّصَارَى الْآن بِالْإِيمَانِ بِمُحَمَّدٍ صَلَّى اللَّه عَلَيْهِ وَسَلَّمَ ; فَإِنَّ فِي الْإِنْجِيل وُجُوب الْإِيمَان بِهِ



The people of the Gospel ruled by the Gospel at that particular time (meaning the time it was revealed to Jesus), as for now it is abrogated and it is said that this is an order for the Christians of this time to have faith in Muhammad (peace be upon him) because according to the Gospel it is compulsory for them to do so. (Abu 'Abdullah al-Qurtubi, Tasfir al Jami' li-ahkam al-Qur'an, Commentary on Surah 5:43, Source) Does it mean if there is a domestic fight between two ahle kitab they must rule by injeel or quran