The verse is telling us when Ya'juj and Wama'juj (Gog and Magog) will be released from the dam - from which they were confined to - into the world after the wall is reduced to dust.
He said: “This (wall) is a mercy from my Lord: but when the warning of my Lord comes to pass, He will reduce it to dust (and Gog and Magog would thus be released into the world); and the promise of my Lord is true.”
(Qur’an, al-Kahf, 18:98)
This below verse is telling us people who were banned from a town which was destroyed, and those people will only return on the back of Gog and Magog. We should be asking ourselves which town the Quran is referring here, who are the Gog and Magog, and has this action occurred.
“But there is a ban on a town which We have destroyed: that they (the people of the town) shall not return (to reclaim that town as their own); until Gog and Magog are let through (their barrier), and they swiftly spread out in every direction (replicating themselves amongst all the peoples of the world).”
(Qur’an, al-Anbiyah, 21:95-96)
According to some Islamic scholars, the town is Bait Al-Maqdis, the people who returned are the Jews, and Gog and Magog are the powerful forces who facilitated their return and protect them thru force, through UN, and thru every means possible today (NATO, IMF, World Bank, Mass media, intelligence agencies, etc). Allah knows best.
It resonates me because it explains the state of affairs in the world today, the situation of Masjid Al-Aqsa, and also knowing that Gog and Magog will be destroyed by Allah after the return of the True Messiah - Jesus Son of Mary (peace be upon him).