"Have you not seen those who dispute concerning the signs of Allah?" meaning: they deny the signs of Allah. "How are they averted?" meaning: how are they turned away from them?! "But they are going to know."
﴿أَلَمْ تَرَ إِلَى الَّذِينَ يُجَادِلُونَ فِي آيَات الله﴾ يَعْنِي: يجحدون بآيَات اللَّه ﴿أَنَّى يصرفون﴾ كَيفَ يصرفون عَنْهَا؟! ﴿فَسَوْفَ يَعْلَمُونَ﴾