The objection identifies a real moral question, but it assumes more than the Quran says. Qur'an 4:157 denies that Jesus was killed or crucified, yet it does not say that Allah created a worldwide lie, approved Christian doctrine, or guaranteed that people would remain deceived for two thousand years.
What the verse actually says
The objection is stated plainly: if Allah made someone appear to be Jesus on the cross, then He seems to have authored the central event from which Christianity grew. On this reading, billions were misled by a divine act, and the Gospel record was bound to become corrupt.
"They did not kill him, nor did they crucify him, but it was made to appear to them so. And those who differ over it are in doubt about it. They have no knowledge of it except the following of assumption. And they certainly did not kill him. Rather, Allah raised him to Himself."
Quran 4:157-158
The Arabic phrase is shubbiha lahum, literally, "it was made to appear to them." The wording is passive: it does not identify an agent or explain the precise manner of the confusion. The Quran's central point is that their claim to have killed Jesus was false and based on uncertainty, while Allah rescued and raised him.
What classical interpretation does and does not require
The dominant classical interpretation is that another person was made to resemble Jesus and was crucified instead. But the Quran does not name that person, describe the process, or say that God intended to establish a religion around the event. Some exegetes also emphasized the broader confusion and conflicting reports rather than offering detailed speculation.
That distinction matters. Causing persecutors to fail in killing a righteous prophet is not the same as teaching humanity to worship a man. Jesus himself, according to the Quran, taught worship of Allah. The later claims that Jesus is divine, that his death atones for sin, and that salvation depends on the cross are human theological conclusions, not instructions given by Allah.
Permission is not endorsement
Allah permits many false beliefs and injustices to occur for a time without approving them. Human beings interpret events, preserve traditions, alter texts, and build institutions. The existence, size, or historical success of Christianity therefore cannot prove that Allah founded it. Nor does the verse say that every later Christian was personally deceived by a divinely engineered illusion; it says that those involved in the original event were confused and that their certainty was unfounded.
This does not remove every philosophical difficulty from the substitution interpretation. Someone may still ask why Allah chose that particular form of rescue. The Quran, however, does not require us to claim that Allah "authored Christianity." It establishes a narrower point: Jesus was not killed by his enemies, Allah raised him, and the cross became the center of a later human doctrine. That is a challenge to Christian theology, not evidence that Allah is deceptive.