﴿ فَٱخْتَلَفَ ٱلْأَحْزَابُ مِنۢ بَيْنِهِمْ ۖ فَوَيْلٌۭ لِّلَّذِينَ كَفَرُوا۟ مِن مَّشْهَدِ يَوْمٍ عَظِيمٍ ﴾

“And yet, the sects [that follow the Bible] are at variance among themselves [about the nature of Jesus Woe, then, unto all who deny the truth when that awesome Day will appear!”

But the factions differed among themselves that is to say the Christians they differed regarding Jesus was he the son of God? A god alongside Him? Or was he the third of three gods? So woe — meaning severe punishment will be meted out — to those who disbelieve those who disbelieve in the way mentioned and in other ways at the scene of an awful Day that is to say woe to them when they are present at the Day of Resurrection and witnessing its terrors.