Idolators enjoy Their destined Share in This Life, but will lose Their Supporters upon Death
Allah said,فَمَنْ أَظْلَمُ مِمَّنِ افْتَرَى عَلَى اللَّهِ كَذِبًا أَوْ كَذَّبَ بِآيَـتِهِ
(Who is more unjust than one who invents a lie against Allah or rejects His Ayat) meaning, none is more unjust than whoever invents a lie about Allah or rejects the Ayat that He has revealed. Muhammad bin Ka`b Al-Qurazi said that,
أُوْلَـئِكَ يَنَالُهُمْ نَصِيبُهُم مِّنَ الْكِتَـبِ
(For such their appointed portion will reach them from the Book) refers to each person's deeds, alloted provisions and age. Similar was said by Ar-Rabi` bin Anas and `Abdur-Rahman bin Zayd bin Aslam. Allah said in similar statements,
قُلْ إِنَّ الَّذِينَ يَفْتَرُونَ عَلَى اللَّهِ الْكَذِبَ لاَ يُفْلِحُونَ - مَتَـعٌ فِى الدُّنْيَا ثُمَّ إِلَيْنَا مَرْجِعُهُمْ ثُمَّ نُذِيقُهُمُ الْعَذَابَ الشَّدِيدَ بِمَا كَانُواْ يَكْفُرُونَ
(Verily, those who invent a lie against Allah, will never be successful. (A brief) enjoyment in this world! And then unto Us will be their return, then We shall make them taste the severest torment because they used to disbelieve.) 10:69-70 and,
وَمَن كَفَرَ فَلاَ يَحْزُنكَ كُفْرُهُ إِلَيْنَا مَرْجِعُهُمْ فَنُنَبِّئُهُم بِمَا عَمِلُواْ إِنَّ اللَّهَ عَلِيمٌ بِذَاتِ الصُّدُورِ نُمَتِّعُهُمْ قَلِيلاً
(And whoever disbelieves, let not his disbelief grieve you. To Us is their return, and We shall inform them what they have done. Verily, Allah is the All-Knower of what is in the breasts (of men). We let them enjoy for a little while.) 31:23-24. Allah said next,
حَتَّى إِذَا جَآءَتْهُمْ رُسُلُنَا يَتَوَفَّوْنَهُمْ
(until when Our messengers come to them to take their souls.) Allah states that when death comes to the idolators and the angels come to capture their souls to take them to Hellfire, the angels horrify them, saying, "Where are the so-called partners (of Allah) whom you used to call in the life of this world, invoking and worshipping them instead of Allah Call them so that they save you from what you are suffering." However, the idolators will reply,
ضَـلُّواْ عَنَّا
("They have vanished and deserted us") meaning, we have lost them and thus, we do not hope in their benefit or aid,
وَشَهِدُواْ عَلَى أَنفُسِهِمْ
(And they will bear witness against themselves) they will admit and proclaim against themselves,
أَنَّهُمْ كَانُواْ كَـفِرِينَ
(that they were disbelievers.)
Tafsir Ibn Kathir (abridged, English).