Not with the mere prevention of the unbelievers to recognize the truth, which would be enough to condemn them to hell, the Koran also says that the hateful God also causes the unbelievers to sin, so that he can punish them later:
And had Allah willed, He could have made you (all) one nation, but He sends astray whom He wills and guides whom He wills. But you shall certainly be called to account for what you used to do. (16:93)
Although Satan seduces Muslims, it is Allah Himself who fools the unbelievers.
(They are) swaying between this and that, belonging neither to these nor to those, and he whom Allah sends astray, you will not find for him a way (to the truth - Islam). (4:143 siehe auch 4:88 und 74:31)
Allah deliberately deceive mankind:
Have you seen him who takes his own lust (vain desires) as his ilah (god), and Allah knowing (him as such), left him astray, and sealed his hearing and his heart, and put a cover on his sight. Who then will guide him after Allah? Will you not then remember? (45:23)
Allah even sends out demons to inspire unbelievers to commit further evil deeds, which he can later use against them:
See you not that We have sent the Shayatin (devils) against the disbelievers to push them to do evil. (19:83)
According to verse 3:54, Allah forges plans against unbelievers to deceive them (the literal meaning of the word of Makara). Elsewhere, the Qur'an also declares that Allah deceives unbelievers by pretending to do good deeds and, in reality, to commit evil deeds that merely increase the punishment:
Verily, those who believe not in the Hereafter, We have made their deeds fair-seeming to them, so they wander about blindly. (27:4 - see also 39:23, 6:39, 35:8, 13:27 und 14:4)
Allah recruits Satan to join him to make the unbelievers think that they are doing good:
When Our Torment reached them, why then did they not believe with humility? But their hearts became hardened, and Shaitan (Satan) made fair-seeming to them that which they used to do. (6:43)
The joke, of course, refers only to non-Muslims who will protest on Judgment Day by saying that they have done everything they thought right, but were sent to hell:
Nay, it has become manifest to them what they had been concealing before. But if they were returned (to the world), they would certainly revert to that which they were forbidden. And indeed they are liars. (6:28)
And they said: "There is no (other life) but our (present) life of this world, and never shall we be resurrected (on the Day of Resurrection)." (6:29)
In sum, Allah differs in nothing from his alleged opponent Satan. The only remaining question is: Is not Allah himself the Satan?