Shaykhul Islaam Ahmad ibn Taymeeyah 728AH (May Allah have mercy on him) said,

قال ابن تيمية اللَّهُ يَنْصُرُ الدَّوْلَةَ الْعَادِلَةَ وَإِنْ كَانَتْ كَافِرَةً وَلَا يَنْصُرُ الدَّوْلَةَ الظَّالِمَةَ وَإِنْ كَانَتْ مُؤْمِنَةً

28/63 مجموع فتاوى ابن تيمية

“Allah will support the just state even if it is led by unbelievers, but Allah will not support the oppressive state even if it is led by believers.”

Source: Majmu’ Al-Fatawa 28/63