What is the ruling on working with groups who are in opposition to the methodology of the Qurʾān and Sunnah in charitable acts or daʿwah?
Shaykh Ṣāliḥ ibn Fawzān al-Fawzān:
This enters under the statement of Allah;
۞ وَتَعَاوَنُوا عَلَى الْبِرِّ وَالتَّقْوَىٰ ۖ وَلَا تَعَاوَنُوا عَلَى الْإِثْمِ وَالْعُدْوَانِ
“..and do not help one another upon sin and injustice.” (Q 4:2).
Working with groups who are deviant and misguided is helping one another upon sin and injustice.