"The claim that God sacrificed Himself to Himself doesn't make sense when you examine Allah's nature in Islam. Allah is One, self-sufficient, and free from needs—He doesn't require anything, let alone a sacrifice from Himself to Himself. The Qur'an says, 'Allah is the Rich beyond need, the Praiseworthy' (Surah Luqman, 31:12). Why would an all-powerful, perfect God need to stage such an act? It implies a dependency or a flaw, which contradicts Tawhid—Allah's absolute unity and independence.
In the Trinity, the idea that God the Son died to appease God the Father suggests a division within God: one part sacrificing, another part receiving. But if God is One, who is the sacrifice for? Himself? This creates confusion and diminishes His majesty. In Islam, Allah forgives directly—He doesn't need a middleman or a dramatic self-sacrifice. The Qur'an teaches, 'Whoever does evil or wrongs himself but then seeks forgiveness of Allah will find Allah Forgiving and Merciful' (Surah An-Nisa, 4:110). Tawhid keeps it clear: Allah is One, unchanging, and merciful—no complex transactions required."
Jesus was sent to bring about the new covenant in which we now live which brings in grace. This was to fulfill the requirements of the law.
The punishment of sin is death.
God is Just. Allah is not.
See God is not merciful if he can't forgive sins without blood sacrifice for more details