(1) It’s a “vanity” because I am the author, not anyone else. (2) It’s an “opinion/editorial” because it is not fact-based but just an opinion in the form of a question. (3) It is “news/current events” because the subject matter, the Las Vegas shooting, is “news “ and “current events”.
Had it been JUST a (1) all by itself, THEN it would have been JUST a “vanity”. That’s just my opinion and if the mods want to write the rules more strictly, to please themselves or just to please you, I’ll surely cooperate.