It's my understanding that means-ends unity is central to the critique of state power and broadly shared by anarchists. Anarcho-capitalists reject basically eve

It's my understanding that means-ends unity is central to the critique of state power and broadly shared by anarchists. Anarcho-capitalists reject basically everything in anarchism except anti-statism, so you can't really compare them to other flavors in a sensible way most of the time, and I regard the name anarcho-capitalists as a misnomer and I call them libertarians or anti-state capitalists or what have you (though I respect their right to label themselves as they please). I don't know that anarcho-capitalists reject means-ends unity as much as they have different ends in mind. Anarchism may not be a single set of ideas but it's certainly a distinct lineage that descends from certain critiques of capitalism, hierarchy/state power, and Marxism (means-ends unity being essential to the critique of Marxism, eg, that a proletarian state will become oppressive for the same reason any other state becomes oppressive). For instance, it's broadly held by anarchists that a society should be voluntary and not based on coercion. If someone called themselves an anarchist but was, say, in favor of aggressive policing, I'd wonder what the heck they meant by "anarchist".