Bolton is an anti-communist, anti-jihadist hawk. Neo means new. The neo-cons were former democrat Vietnam war hawks that supported LBJ in 1964 but by 1980 supported Reagan. In other words they were new Conservatives. Bolton supported Goldwater and Reagan from the beginning.
Just because you want to hurl a slur or insult at Bolton doesn’t mean you can change the meaning of a word.
Many of today’s neocons were not around or at least not of political age during the Vietnam War. Get with the times!