Salamualikum ! I have a question . I firmly believe in that the quran was not created and it is the word of Allah and knowledge of Allah . I dont have any doubt in it . Praise be to Allah alone . But I want to ask something . Since we belive that quran is the knowdlege of Allah, the generations mentioned in quran such as people of Aad or people of prophet nooh peace be upon him . Allah destroyed them . And Allah also tells us that whatever they said to the prophets . I dispel this doubt and pay no attention to it by believing that All wrote the qadr ( divine decree ) of all creations . Wheter a person will be righteous or sinful etc. Can I belive that Allah knew that the people of different nations will disbelife and reject the prophets . This is confusing me . Because Allah knew their qadr .

All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.

There is no doubt that Allah knew the situation of the creation before He created them, whether they will be among the people of happiness [will be admitted to Paradise] or will be among the losers [i.e. will be in Hellfire]. He also knew whether they will believe or disbelieve, and He wrote that in the Preserved Tablet, and the Angels wrote that when they breathed the soul into them.

Allah even knows that if He would bring the disbelievers back to this life, they would go back to their disbelief and denial. Allah Says about the people of Hellfire (what means): {And even if they were returned, they would return to that which they were forbidden; and indeed, they are liars.} [Quran 6:28]

Allah informed His Prophet Noah that He would torture nations in the future for their disbelief. Allah Says (what means): {It was said, "O Noah, disembark in security from Us and blessings upon you and upon nations [descending] from those with you. But other nations [of them] We will grant enjoyment; then there will touch them from Us a painful punishment."} [Quran 11:48]

Allah informed us in many verses about the wrecked people [those who will be in Hellfire] that if every Sign/Evidence/Verse would come to them, they will still not believe, and there are many verses in this regard.

Therefore, it is without a doubt that Allah knows the fate of the people, whether they will believe or disbelieve, but Allah did not torture them except after sending Messengers to them in order to establish evidence against them and they will not have any excuse.

Allah knows best.