First they were wrong and said Gog was a demon. Later, they were wrong and said Gog was Satan. Now they are wrong and say Gog is a coalition of nations. At least they're consistent-ish.
Gog was a hypothetical enemy in Ezekiel who would attack Judea from the far north. It didn't happen. The term was later borrowed by the author of Revelation. (There was an intervening change in tradition around the 2nd century BCE so Gog of Magog became Gog and Magog.) In both cases, Gog is a leader and not a coalition of nations. Neither has anything to do with the modern era.