إيمان المؤمنين يفسد بموادة الكفار وأن من كان مؤمناً لا يوالي من كفر
The faith of Muslims is spoiled if they are nice to non-Muslims [Kuffar], and a Muslim can not be close with a non-Muslim.
in Commentary of Al-Baghawi [Tafsir Al-Baghawi] on Quran 58:22