Possibly my biggest phrasing peeve, coming up regularly in relation to abortion, war, police killings, etc.:

Murder is definitionally illegal!

NO 👏 MATTER 👏 HOW 👏GRUESOME 👏 OR 👏 GRATUITOUS 👏 IF 👏 YOU 👏 KILL 👏 A 👏 HUMAN 👏 IN 👏 ACCORDANCE 👏 WITH 👏 LAW 👏 IT’S 👏 HOMICIDE 👏 BUT 👏 NOT 👏 MURDER