Why does Allah Almighty admit every disbeliever to Hellfire, even if they did not harm Muslims or even helped them?

The answer advises learning the Quran instead of preoccupying oneself with doubts. Allah does not punish anyone in the Hellfire except after establishing proof against them. Whoever persists in disbelief deserves punishment, as Allah Almighty says: "And if Allah had known any good in them, He would have made them hear" and "If Allah knows any good in your hearts, He will give you better than what was taken from you." Whoever Allah knows to be incapable of guidance, He misguides them justly, and they will not believe, even if they see every sign. Disbelievers enter the Hellfire due to their disbelief in Allah, even though He created them, provided for them, and established proof against them. As for some disbelievers helping Muslims, Allah rewards them for it in this world. In the Hadith: "Indeed, Allah does not wrong a believer concerning a good deed... As for the disbeliever, he is fed for the good deeds he did for Allah in this world." And the disbeliever is of the worst character towards his Lord, as Allah Almighty says: "And the disbeliever is ever an assistant against his Lord," meaning an aid to Satan in enmity towards Allah.