Assalam u Alaikum, I was just wondering what will happen to people other than the people of the book on the day of judgment? Because I read that when Isa ibn Mariam (as) (Jesus) comes back, all the People of the Book will believe in him and become Muslims. But what about people who are not from the People of the book like Hindus or Buddhists or Sikhs etc.? What about them? Will they convert and believe in Isa (as) or not? Will they follow Ad-Dajjal (Antichrist)? Thanks and may Allah (swt) bless you!
The short answer to your question is this verse,
“Verily, those who have believed (the Muslims), those who came back apologizing (the Jews), the Sabeans, the Christians, the Magi and those have associated [others with God in worship] – God will decisively judge between them on the Day of Resurrection. Verily, God is upon everything a Witness.” (22:17)
It is a matter of Al-Ghayb (the Beyond). This verse makes it clear that such judgment is up to God only. We cannot nor should attempt to make a judgment about the destiny of any people of any belief.
As for your point about Jesus, peace be upon him; God tells us in the Quran, “And there is from the People of the Book [none] but who will surely believe in him (Jesus) before his death. And on the Day of Resurrection he will be upon them a witness.” (4:159)
The preceding three verses state very emphatically and unambiguously that Mary (PBUH) was a virgin when she gave birth to Jesus (PBUH), that nobody killed Jesus and that, in fact, he never died at all – God raised him up to Him. When Jesus comes back, the People of the Book – the Jews and the Christians – will have to believe the truth about him as taught in the Quran, because Jesus will be there teaching the same teachings until he dies. Whether they continue to believe after his death is unknown. They may differ about him yet again like they did the first time!
The Antichrist, by definition, will come before Christ Jesus does. This is confirmed in the Hadeeth. Jesus will easily defeat him.
We don’t know whether people other than Christians and Jews will choose to follow Jesus when he comes back and accept Islam. Nor do we know what will be the judgment of non-Muslims on Judgment Day. But we know this for sure: “God does not do a spec’s weight of injustice” (4:40) So, rest assured that God will dispense His judgment fairly and gracefully as only He can. After Salmaan Al-Faarisi, may God have been pleased with him, accepted Islam (he had been a Christian), he asked the Prophet (PBUH), with great concern, what will be the destiny of his parents and other relatives who were righteous people but had no chance to know about Islam until they died. God revealed this verse to answer that question,
“Verily, those who have believed (the Muslims), those who came back apologizing (the Jews), the Christians and the Sabeans – those who believed in God and the Final Day and did a righteous [deed], for them will be their reward with their Lord and there shall be no fear upon them, nor shall they grieve!” (2:62)
God is fair; He would not punish a people until after He sends them a messenger (17:15). Thus, those who die without having any knowledge of Islam will be judged on their reply to their prophets and messengers. And if they had none, on their faith in God and Judgment Day and their actions in life, something which only God truly knows.