Do not argue with the People of the Book

سُوۡرَةُ العَنکبوت
وَلَا تُجَادِلُوۡٓا اَهۡلَ الۡكِتٰبِ اِلَّا بِالَّتِىۡ هِىَ اَحۡسَنُ ۖ اِلَّا الَّذِيۡنَ ظَلَمُوۡا مِنۡهُمۡ‌ وَقُوۡلُوۡٓا اٰمَنَّا بِالَّذِىۡۤ اُنۡزِلَ اِلَيۡنَا وَاُنۡزِلَ اِلَيۡكُمۡ وَاِلٰهُـنَا وَاِلٰهُكُمۡ وَاحِدٌ وَّنَحۡنُ لَهٗ مُسۡلِمُوۡنَ‏ ﴿۴۶﴾

Al-Ankaboot
And dispute ye not with the People of the Book, except with means better (than mere disputation) unless it be with those of them who inflict wrong (and injury): but say "We believe in the Revelation which has come down to us and in that which came down to you; Our God and your God is one; and it is to Him we bow (in Islam)." [Al-Ankaboot: 46]