Romans 16:17 "17 Now I urge you, brethren, note those who cause divisions and offenses, contrary to the doctrine which you learned, and avoid them."
A divisive man is anyone who fights against truth, bringing false doctrine or using manipulative tricks to distort the truth, even lying outright to cause trouble between friends or spouses.
Definition of Divisive: ": causing a lot of disagreement between people and causing them to separate into different groups" Websters Dictionary