Our enemies?
And it's not a slur if it's true. Let's not pretend that it's for those "generally favoring a more interventionist policy against our enemies".
The term neoconservative refers to Trotskyist academics from New York. Trotsky described himself as a Marxist, and a Bolshevik–Leninist, as well as a follower of Friedrich Engels, Vladimir Lenin, Karl Liebknecht, and Rosa Luxemburg.
This faction of the Left that was losing influence to the "New Left" decided to attach themselves to Conservatism in order to steer their power for their own agenda. They pushed their way in with "The enemy of my enemy is my friend.", hiding that they've shown themselves to be far, far more anti-American.
In the U.S., neoconservativism spread among the Liberal Hawks who were Democrats; with adherents such as Paul Wolfowitz, Paul Bremer, Bill Clinton, Al Gore, Joe Lieberman, Michael Bloomberg, Barack Obama, Madeleine Albright, Thomas Friedman, and Samantha Power among those whose names would be recognized in the public sphere.
These are not conservatives despite their Marxist playbook approach of naming themselves "neo-conservative".
Good Lord, Man. Your reading comprehension is severely lacking. A slur is using an incorrect definition of a word to describe someone the definition does not fit. If you are not a former liberal democrat that is also an anti-communist you are not a neo-con. A Conservative that is an interventionist hawk in foreign policy can be called a hawk, militarist or war monger but he isn’t a neo-con. The Russians, Chinese, North Koreans and Iranian Mullahs are our enemies and half-wits like you use the term neo-con to slur anyone of whatever political persuasion that opposes our enemies. You listed a bunch of liberals and most of them would never be considered neo-cons. They are not “New Conservatives” now and have never been. Really? Barack Obama a neo-con?