Ok, he used the word "decentralize", but in context, he means something different than what I mean. He's saying basically that we need to engage in politics and promote things like "brexit".
I think here Hoppe presents a false dichotomy: He says if you against "political centralization" then you must support all "segregation, separation, secession".
page 172. Also, apparently he said a quote too that goes like "my goal is to introduce racial determinism to the Austrian method" which to me sounds seems like it explains his whole motivation straightforwardly. Can't remember where the quote is.