Since you asked for the common 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][1].


Some seem to think that it is prophetical, and fulfilled in the destruction of Jerusalem, and the slaying of the Jews, who rejected Christ.

> **Pulpit Commentary**
> 
> 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**
> 
> 27. 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.
  [1]: http://biblehub.com/commentaries/luke/19-27.htm