ذَٰلِكَ بِأَنَّهُمُ ٱتَّبَعُوا۟ مَآ أَسْخَطَ ٱللَّهَ وَكَرِهُوا۟ رِضْوَٰنَهُۥ فَأَحْبَطَ أَعْمَٰلَهُمْ

That is because they follow what is displeasing to Allah and are averse to His pleasure, therefore He has made null their deeds.