Allah's statement,

[إِنَّمَا يَنْهَـكُمُ اللَّهُ عَنِ الَّذِينَ قَـتَلُوكُمْ فِى الدِّينِ وَأَخْرَجُوكُم مِّن دِيَـرِكُمْ وَظَـهَرُواْ عَلَى إِخْرَجِكُمْ أَن تَوَلَّوْهُمْ]

(It is only as regards those who fought against you on account of religion, and have driven you out of your homes, and helped to drive you out that Allah forbids you to befriend them.) (60:9) means, `Allah forbids you from being kind and befriending with the disbelievers who are openly hostile to you, those who fought against you, expelled you and helped to expel you. Allah the Exalted forbids you from being their friends and orders you to be their enemy.' Then Allah stresses His threat against being friends with them, by saying,

[وَمَن يَتَوَلَّهُمْ فَأُوْلَـئِكَ هُمُ الظَّـلِمُونَ]

(And whosoever will befriend them, then such are the wrongdoers.) As He said;

[يَـأَيُّهَا الَّذِينَ ءَامَنُواْ لاَ تَتَّخِذُواْ الْيَهُودَ وَالنَّصَـرَى أَوْلِيَآءَ بَعْضُهُمْ أَوْلِيَآءُ بَعْضٍ وَمَن يَتَوَلَّهُمْ مِّنكُمْ فَإِنَّهُ مِنْهُمْ إِنَّ اللَّهَ لاَ يَهْدِى الْقَوْمَ الظَّـلِمِينَ ]

(O you who believe! Take not the Jews and the Christians as protecting friends, they are but protecting friends of each other. And if any among you takes them (as protecting friends), then surely, he is one of them. Verily, Allah guides not those people who are the wrongdoers) (5:51)

[يأَيُّهَا الَّذِينَ ءَامَنُواْ إِذَا جَآءَكُمُ الْمُؤْمِنَـتُ مُهَـجِرَتٍ فَامْتَحِنُوهُنَّ اللَّهُ أَعْلَمُ بِإِيمَـنِهِنَّ فَإِنْ عَلِمْتُمُوهُنَّ مُؤْمِنَـتٍ فَلاَ تَرْجِعُوهُنَّ إِلَى الْكُفَّارِ لاَ هُنَّ حِلٌّ لَّهُمْ وَلاَ هُمْ يَحِلُّونَ لَهُنَّ وَءَاتُوهُم مَّآ أَنفَقُواْ وَلاَ جُنَاحَ عَلَيْكُمْ أَن تَنكِحُوهُنَّ إِذَآ ءَاتَيْتُمُوهُنَّ أُجُورَهُنَّ وَلاَ تُمْسِكُواْ بِعِصَمِ الْكَوَافِرِ وَاسْـَلُواْ مَآ أَنفَقْتُمْ وَلْيَسْـَلُواْ مَآ أَنفَقُواْ ذَلِكُمْ حُكْمُ اللَّهِ يَحْكُمُ بَيْنَكُمْ وَاللَّهُ عَلِيمٌ حَكِيمٌ - وَإِن فَاتَكُمْ شَىْءٌ مِّنْ أَزْوَجِكُمْ إِلَى الْكُفَّـرِ فَعَـقَبْتُمْ فَآتُواْ الَّذِينَ ذَهَبَتْ أَزْوَجُهُمْ مِّثْلَ مَآ أَنفَقُواْ وَاتَّقُواْ اللَّهَ الَّذِى أَنتُمْ بِهِ مُؤْمِنُونَ ]

(10. O you who believe! When believing women come to you as emigrants, examine them; Allah knows best as to their faith, then if you ascertain that they are true believers, send them not back to the disbelievers. They are not lawful for the disbelievers nor are the disbelievers lawful for them. But give them (disbelievers) that which they have spent (on their dowery). And there will be no sin on you to marry them if you have paid their due to them. Likewise do not keep the disbelieving women, and ask for that which you have spent (on their dowery) and let them (the disbelievers) ask for that which they have spent. That is the judgement of Allah, He judges between you. And Allah is All-Knowing, All-Wise.) (11. And if any of your wives have gone from you to the disbelievers then you succeed over them (gain victory); then pay those whose wives have gone, the equivalent of what they had spent. And have Taqwa of Allah, the One in Whom you are believers.)