Active rejection and opposition to divine guidance

ٱلَّذِينَ يَصُدُّونَ عَن سَبِيلِ ٱللَّهِ وَيَبْغُونَهَا عِوَجًا وَهُم بِٱلْـَٔاخِرَةِ هُمْ كَـٰفِرُونَ

Who averted [people] from the way of Allāh and sought to make it [seem] deviant while they, concerning the Hereafter, were disbelievers.