Obadiah 1:16 refutes universal salvation, not supports it.

Here's why:

"For just as you drank on My holy mountain, all the nations will drink continually. They will drink and swallow, and become as if they had never existed."

This is a picture of complete judgment, not restoration.

The "cup" in prophetic language often symbolizes God's wrath (Jeremiah 25:15-17, Isaiah 51:17, Revelation 14:10).

The nations are said to drink continually, meaning the judgment is full and inescapable.

The outcome? They will become as if they had never existed, not redeemed, not restored, but wiped out.

If universal salvation were true, this verse would have to be reworded to say, "They will drink, be corrected, and restored to life." But instead, the result is obliteration, not salvation.

This supports the fulfilled view that God judged the nations who opposed Him, and not everyone ends up saved.