If muslims do a social boycott of oppressed and consider it (boycott) an act of oppression, he is also out of the fold of Islam. (Ahkam-e-Shariat Vol 1 pp.112, 128, 139, 177)
Kama waislam watawatenga kijamii juu ya Makadiani na kama mtu akaona kuwa wanadhulumiwa kwa kitendo hicho cha kuwatenga ni udhalimu yuko nje ya jamii ya kiislam pia. (Ahkam Sheriat Vol. I pg 112 128, 139,177)