Since you asked for an "orthodox" (small "o") understanding of this, I'm going to turn to several well-known Bible commentaries, all conveniently located here, associated with the verse in question, an BibleHub.com.
Some seem to think that it is prophetical, and fulfilled in the destruction of Jerusalem, and the slaying of the Jews, who rejected Christ.
Verse 27. - But those mine enemies, which would not that I should
reign over them, bring hither, and slay them before me. An obvious
reference to the Lord's dealings with the chosen people, and an
unmistakable reference to the awful ruin and disaster which was so
soon to overwhelm the city and temple and the whole nationality.
Gill's Exposition of the Entire Bible
But those mine enemies,.... Meaning particularly the Jews, who were
enemies to the person of Christ, and hated and rejected him, as the
King Messiah; and rebelled against him, and would not submit to his
government; and were enemies to his people, and were exceeding mad
against them, and persecuted them; and to his Gospel, and the
distinguishing truths of it, and to his ordinances, which they
rejected against themselves:
which would not that I should reign over them; see Luke 19:14
bring hither, and slay them before me; which had its accomplishment in
the destruction of Jerusalem, when multitudes of them were slain with
the sword, both with their own, and with their enemies;
Clarke's Commentary on the Bible
Those - enemies - bring hither - the Jews, whom I shall shortly slay
by the sword of the Romans.
Others seem to believe that it refers to the ultimate fate of all who reject Christ.
People's New Testament
19:27 Those my enemies. This portrays the fate, not of church members,
but of those who would not have the Lord reign over them. It embraces
all the impenitent. Compare Mt 13:49 21:44 25:30:00 2Th 1:8-10.
Jamieson-Fausset-Brown Bible Commentary
- bring hither, &c.—(Compare 1Sa 15:32, 33). Referring to the awful destruction of Jerusalem, but pointing to the final destruction of all
that are found in open rebellion against Christ.
Either understanding seems to be common, just with different groups and commentators.