I think we're going to disagree, which is fine, but I'll post the text and let others assess what the meanings of 'nations' is in the context of the quotation.

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https://biblehub.com/nkjv/matthew/25.htm

31“When the Son of Man comes in His glory, and all the [c]holy angels with Him, then He will sit on the throne of His glory. 32All the nations will be gathered before Him, and He will separate them one from another, as a shepherd divides his sheep from the goats. 33And He will set the sheep on His right hand, but the goats on the left.

[...]

41“Then He will also say to those on the left hand, ‘Depart from Me, you cursed, into the everlasting fire prepared for the devil and his angels: 42for I was hungry and you gave Me no food; I was thirsty and you gave Me no drink; 43I was a stranger and you did not take Me in, naked and you did not clothe Me, sick and in prison and you did not visit Me.’

44“Then they also will answer [d]Him, saying, ‘Lord, when did we see You hungry or thirsty or a stranger or naked or sick or in prison, and did not minister to You?’ 45Then He will answer them, saying, ‘Assuredly, I say to you, inasmuch as you did not do it to one of the least of these, you did not do it to Me.’ 46And these will go away into everlasting punishment, but the righteous into eternal life.”