Judgment of the nations

The judgment of the nations (Matthew 25:31–46). After the tribulation, the Lord Jesus will sit in judgment over the Gentile nations. They will be judged according to their treatment of Israel during the tribulation. This judgment is also called the judgment of the sheep and the goats because of the imagery Jesus uses in the Olivet Discourse. Those who showed faith in God by treating Israel favorably (giving them aid and comfort during the tribulation) are the “sheep” who will enter into the Millennial Kingdom. Those who followed the Antichrist’s lead and persecuted Israel are the “goats” who will be consigned to hell.
Source: gotquestions.org