Prayer: What is the rule of prayer and fasting for those in groups that are unjustly hostile toward each other?
English:
Question #720:
What rule applies to the prayer and fasting of those who belong to different groups that are jealous of and even hostile to one another for no reason?
Answer #720:
It is not permissible for a mukallaf to nurture envy, enmity and hostility towards others, but doing so does not invalidate one’s prayers and fasting.
-Imam Khamenei, Practical Laws of Islam, Importance and Conditions of Prayer