Allah commands shunning the disbelievers, even if they are one's parents or children, and prohibits taking them as supporters if they choose disbelief instead of faith. Allah warns,
لاَّ تَجِدُ قَوْماً يُؤْمِنُونَ بِاللَّهِ وَالْيَوْمِ الاٌّخِرِ يُوَآدُّونَ مَنْ حَآدَّ اللَّهَ وَرَسُولَهُ وَلَوْ كَانُواْ ءَابَآءَهُمْ أَوْ أَبْنَآءَهُمْ أَوْ إِخْوَنَهُمْ أَوْ عَشِيرَتَهُمْ أُوْلَـئِكَ كَتَبَ فِى قُلُوبِهِمُ الإِيمَـنَ وَأَيَّدَهُمْ بِرُوحٍ مِّنْهُ وَيُدْخِلُهُمْ جَنَّـتٍ تَجْرِى مِن تَحْتِهَا الاٌّنْهَـرُ
(You will not find any people who believe in Allah and the Last Day, making friendship with those who oppose Allah and His Messenger, even though they were their fathers or their sons or their brothers or their kindred (people). For such He has written (predetermined) faith in their hearts, and strengthened them with a Ruh (proof, light and true guidance) from Himself. And He will admit them to Gardens (Paradise) under which rivers flow.) 58:22 Al-Hafiz Al-Bayhaqi recorded that `Abdullah bin Shawdhab said, "The father of Abu `Ubaydah bin Al-Jarrah was repeatedly praising the idols to his son on the day of Badr, and Abu `Ubaydah kept avoiding him. When Al-Jarrah persisted, his son Abu `Ubaydah headed towards him and killed him. Allah revealed this Ayah in his case,
لاَّ تَجِدُ قَوْماً يُؤْمِنُونَ بِاللَّهِ وَالْيَوْمِ الاٌّخِرِ يُوَآدُّونَ مَنْ حَآدَّ اللَّهَ وَرَسُولَهُ
(You will not find any people who believe in Allah and the Last Day, making friendship with those who oppose Allah and His Messenger.")58:22 Allah commanded His Messenger to warn those who prefer their family, relatives or tribe to Allah, His Messenger and Jihad in His cause,
قُلْ إِن كَانَ ءَابَاؤُكُمْ وَأَبْنَآؤُكُمْ وَإِخْوَنُكُمْ وَأَزْوَجُكُمْ وَعَشِيرَتُكُمْ وَأَمْوَلٌ اقْتَرَفْتُمُوهَا
(Say: If your fathers, your sons, your brothers, your wives, your kindred, the wealth that you have gained), amassed and collected,
وَتِجَـرَةٌ تَخْشَوْنَ كَسَادَهَا وَمَسَـكِنُ تَرْضَوْنَهَآ
(the commerce in which you fear a decline, and the dwellings in which you delight), and prefer and love because they are comfortable and good. If all these things,
أَحَبَّ إِلَيْكُمْ مِّنَ اللَّهِ وَرَسُولِهِ وَجِهَادٍ فِي سَبِيلِهِ فَتَرَبَّصُواْ
(are dearer to you than Allah and His Messenger, and striving hard and fighting in His cause, then wait...) for what will befall you of Allah's punishment and torment,
حَتَّى يَأْتِىَ اللَّهُ بِأَمْرِهِ وَاللَّهُ لاَ يَهْدِى الْقَوْمَ الْفَـسِقِينَ
(until Allah brings about His decision. And Allah guides not the people who are rebellious.) Imam Ahmad recorded that Zuhrah bin Ma`bad said that his grandfather said, "We were with the Messenger of Allah ﷺ, while he was holding the hand of `Umar bin Al-Khattab. `Umar said, `By Allah! You, O Messenger of Allah, are dearer to me than everything, except for myself.' The Messenger of Allah ﷺ said,
«لَا يُؤْمِنُ أَحَدُكُمْ حَتَّى أَكُونَ أَحَبَّ إِلَيْهِ مِنْ نَفْسِه»
(None among you will attain faith until I become dearer to him than even himself.) `Umar said, `Verily, now, you are dearer to me than myself, by Allah!' The Messenger of Allah ﷺ said,
«الْآنَ يَا عُمَر»
(Now, O `Umar!)" Al-Bukhari also collected this Hadith. Imam Ahmad and Abu Dawud (this is the version of Abu Dawud) recorded that Ibn `Umar said, "I heard the Messenger of Allah ﷺ saying,
إِذَا تَبَايَعْتُمْ بِالْعِينَةِ وَأَخَذْتُمْ بِأَذْنَابِ الْبَقَرِ وَرَضِيتُمْ بِالزَّرْعِ، وَتَرَكْتُمُ الْجِهَادَ سَلَّطَ اللهُ عَلَيْكُمْ ذُلًّا لَا يَنْزِعُهُ حَتَّى تَرْجِعُوا إِلَى دِينِكُم»
(If you transact in `Iynah (a type of Riba), follow the tails of cows (tilling the land), become content with agriculture and abandoned Jihad, Allah will send on you disgrace that He will not remove until, you return to your religion.)"