When someone is labeled "nationalist", they probably are; when someone is labeled "fascist", they probably are if they're in the Demagogic Party, otherwise, probably not. And use of the terms "neocon" and "globalist" are for the most part diagnostic of incoherent inchoate animus, rather than any intellectual process.
In my experience, there are those who use the ‘neocon’ tag in much the same way that 1930’s Germans used the ‘filthy jew’ tag, and for much the same reason.
And it’s usually not from the ‘right’. It’s the usual suspects among the mouth-breeding, snot-gobbling, intellectually inbred, thumb-sucking left who are p.o’d that anyone can stand against them on any issue at any time.