contentious

inclined or showing an inclination to dispute or disagree, even to engage in law suits

• “a style described as abrasive and contentious”
• “a disputatious lawyer”
• “a litigious and acrimonious spirit”

involving or likely to cause controversy

• “a central and contentious element of the book” Tim W.Ferfuson

having or showing a ready disposition to fight

• “bellicose young officers”
• “a combative impulse”
• “a contentious nature”