The argument identifies a real question about divine foreknowledge, but it confuses certainty with coercion. Abu Lahab's fate was known and recorded by Allah, yet he was condemned for the deliberate hostility and disbelief he chose, not for being forced by a written sentence.
Why the argument seems decisive
The strongest form of the objection is this: Surah al-Masad named Abu Lahab and declared that he would enter the Fire while he was still alive. If he had sincerely accepted Islam afterward, the verse would appear false. But if the verse could not be false, then his conversion was impossible. Since Allah had also written this decree before creation, critics conclude that Abu Lahab could not have done otherwise, and that punishing him would be unjust.
This is not a silly objection. It correctly recognizes that Allah's knowledge and decree cannot be mistaken. Islam does not say that Allah merely guessed what Abu Lahab would do. The question is whether Allah's certain knowledge caused Abu Lahab's choice.
What the verse actually establishes
"May the hands of Abu Lahab be ruined, and ruined is he. His wealth will not avail him, nor what he has earned. He will burn in a Fire of blazing flame, and his wife as well, the carrier of firewood, around her neck is a rope of twisted fiber."
Quran 111:1-5
The passage is a divine declaration of what Abu Lahab would in fact choose and how he would die. It is not a command saying, "Disbelieve," nor does it describe Allah compelling his heart. Abu Lahab remained a conscious agent: he heard the Prophet's message, understood its claim, and repeatedly chose opposition, mockery, and persecution.
There is a difference between "Abu Lahab could not have sincerely converted, given Allah's infallible knowledge of the actual future" and "Allah forced Abu Lahab to reject Islam." The first is a point about the impossibility of making divine knowledge false. The second would mean that an external power compelled his will. The verse establishes the former, not the latter.
Foreknowledge is not compulsion
If a person freely chooses an action, an observer who knows that choice perfectly does not cause it. Allah's knowledge is infinitely greater than human observation, but the basic distinction remains: the decree records what Allah knows His servant will choose; it does not turn a voluntary rejection into an involuntary one.
The Quran repeatedly joins human choice with divine judgment:
"Indeed, We guided him to the way, whether he be grateful or ungrateful."
Quran 76:3
Classical scholars therefore affirmed both truths: Allah creates and knows all things, while people genuinely choose and are accountable for what they knowingly do. No one is condemned merely because a decree was written. The decree is not evidence offered to Abu Lahab before his actions, and he did not act under knowledge of it.
So the argument shows that divine foreknowledge leaves no room for Allah to be mistaken. It does not show that Abu Lahab was coerced, that the verse caused his disbelief, or that his punishment was unjust.