The Quran, the sacred scripture of Islam, considers justice to be a supreme virtue. It is a basic objective of Islam to the degree that it stands next in order of priority to belief in God’s exclusive right to worship (Tawheed) and the truth of Muhammad’s prophethood. God declares in the Quran:
“God commands justice and fair dealing...” (Quran 16:90)
And in another passage:
“O you who believe, be upright for God, and (be) bearers of witness with justice!...” (Quran 5:8)
Therefore, one may conclude that justice is an obligation of Islam and injustice is forbidden. https://www.islamreligion.com/articles/376/justice-in-islam/
I assume Islam is a mercy to mankind to revert to God worship and reject all injustice and false deities.
