How can we reconcile the fatwa of excommunication for whoever says that God's justice is not fully realized in this world, with the saying of some scholars that God's justice is partially realized in this world or absolutely in the Hereafter, and what is the correct understanding of God's justice in this world and the Hereafter?

Perfect justice among people will be achieved in the hereafter with the scales of equity on the Day of Resurrection, where no soul will be wronged in the slightest. As for this world, the oppressed and the oppressor may die without justice being established between them, and grievances are postponed until the Day of Resurrection, as is the reward for the righteous. This world is a realm of action, not a realm of recompense, unlike the hereafter. Allah's attribute of justice does not contradict this, for His justice becomes clearly manifest in the hereafter, where every soul will be fully recompensed for what it earned. The injustice negated from Allah is that related to recompense, for Allah wrongs no one in recompense. Injustice in this world does not occur in Allah's decree; rather, it stems from our limited understanding of some divine wisdoms.