On Populist Reason Ernesto Laclau

Why does Laclau say that the political logic he analyzes in On Populist Reason is the logic of all politics. Do you think that it makes sense to construe politics in terms of the formation of collective identities in the framework of the friend/enemy dynamic? If populist politics involve the friend/enemy framework and the pars pro toto logic how could they construct an inclusive pluralist democracy?

Please include many citaitons supporting claims of Laclaus logic froms source : ‘On Populist Reason’ by Ernesto Laclau