I think that it is the disbelief that leads to their punishment (i.e. disbelief being the primary unjust while actions are secondary).
"As for those who have rejected (these truths), it is all the same whether or not you warn them, for they will not believe. Allah has sealed their hearts and their hearing, and a covering has fallen over their eyes. They deserve severe chastisement." (Al-Baqara, verses 6-7)
Explanation:
"This does not mean that their rejection of the Truth is a consequence of God sealing their hearts. What is meant is that God sealed their hearts and ears as a consequence of their decision to reject the fundamentals of faith, of their deliberate choice of a path divergent from that charted out by the Qur'an. Anyone who has worked for the dissemination of the Truth often finds that if, after full consideration, a person decides against a doctrine, his mind begins to move in a completely opposite direction so that he fails to appreciate anything that is explained to him. His ears become deaf, his eyes are blinded to the merits of that doctrine, and one gets the distinct impression that the person's heart has indeed been sealed."
http://www.islamicstudies.info/tafheem.php?sura=2
"As for those who have rejected (these truths), it is all the same whether or not you warn them, for they will not believe. Allah has sealed their hearts and their hearing, and a covering has fallen over their eyes. They deserve severe chastisement." (Al-Baqara, verses 6-7)
Explanation:
"This does not mean that their rejection of the Truth is a consequence of God sealing their hearts. What is meant is that God sealed their hearts and ears as a consequence of their decision to reject the fundamentals of faith, of their deliberate choice of a path divergent from that charted out by the Qur'an. Anyone who has worked for the dissemination of the Truth often finds that if, after full consideration, a person decides against a doctrine, his mind begins to move in a completely opposite direction so that he fails to appreciate anything that is explained to him. His ears become deaf, his eyes are blinded to the merits of that doctrine, and one gets the distinct impression that the person's heart has indeed been sealed."
http://www.islamicstudies.info/tafheem.php?sura=2
