^2:16 So return to me and change the way you think and act, or I will come to you quickly and wage war against them with the sword from my mouth.

So return to me and change the way you think and act,

This is meant for the whole church. It was meant for those who did not follow Balaamite or Nicolaitan teachings. They need to repent because they permitted these influences in the church.

The Balaamite or Nicolaitan practioners needed to repent and give up their practices.

or I will come to you quickly

This is not the second coming of Christ but an individual church cleaning.

and wage war against them with the sword from my mouth.

This is the same sword which will one day cut down the nations as told in Revelation 19:15. Curiously, the Old Testament diviner, Balaam, also died by the sword, Numbers 31:8 and Joshua 13:22. Recalling that the cultic practices involved sex, the only way to eradicate this from the congregation is to use drastic measures (Numbers 31:16-18).