*We have killed those who are upon the earth. **Let us now kill those who are In the sky** and they would throw their arrows towards the sky and the arrows would return to them besmeared with blood. And in the narration of Ibn Hujr (the words are):" I have sent such persons (Gog and Magog) that none would dare fight against them.* [Sahih Muslim 2937 b] https://sunnah.com/muslim:2937b What does this mean, who is this referring to, who is in the sky? I've searched the internet many times for this but the only results to ever appear are repeats of this hadith.

I want to know that it's said that Yaajooj and Maajooj live behind a really tall and strong wall (made by hazrat zulqurnain ). but if it's so then it means that they are cut off from rest of the world and can't be contacted. So no one is able to tell them about hidayat and Islam.. and they won't be able to accept Islam. Still it's their mistake?
They don't know anything about Islam.. or is there any way for Allah to preach hidayat.
Please clear my mind.

I've heard that the nation of Yajuj and Majuj (Gog and Magog) is in the ratio 999:1 to humans, meaning there are 999 of them for every human. There are approximately 7.8 billion humans on the earth today. This would mean there are approximately 7792.2 billion of the Yajuj and Majuj, which is a number beyond human comprehension. It seems impossible for such a large group to remain hidden and undiscovered for so long. So are the Yajuj and Majuj really on earth or are they in a completely different place? If they are on earth, how is this possible?

Are Yajuj Majuj part of the human race or are they different creatures? Same question about Dajjal.

I have heard that when time gets closer to judgement day, jooj majooj will come out and eat everything on Earth other than sand. Also Dajjal will be here too and Prophet Esa will kill Dajjal with his sword. Before all this happens there will be a huge tornado like wind which will take all Muslims with it and only the kufr will be left. Does this mean that Muslims will not get to see Prophet Esa? Also if jooj majooj eat everything (even eachother) then shouldn't they eat Dajjal?