Ideas about the Kingdom of the Heavens around us and the unity of believers in Christ within it
Titus 3:10 instructs whenever a divisive person approaches ME and tries to start an argument, I am to warn them twice about their behavior and then excuse myself. Thereafter I should ignore them, until they repent of their argumentativeness. It is a simple instruction by which I can avoid being influenced by divisiveness. It is not an instruction to the Church or the State to burn heretics.
The words “heretic” and “heresy” in English New Testament translations are actually transliterations of Greek words that primarily denote division or divisiveness. They are used with those primary meanings in Acts. They did not come to secondarily connote teaching,teachers or doctrines disapproved by a church organization until the late second century. Tha authors of the New Testament did not know of this later technical meaning.