American liberals would never collaborate with ISIS, an entity as undemocratic and illiberal as Stalinism or Nazism. They would easily collaborate with a democratic Japan, Indonesia, or India because of shared values even with great differences of culture; democracy is an internationalist ideal, much as German liberals who survived the Devil's Reich found it easy to collaborate with the British or Americans.
I can imagine American fascists collaborating with Islamofascism because for authoritarian types, culture is not so precious as is t5he desire to exploit and abuse people. Communism? Commies found that rank-and-file members of the fascist militias (Hlinka Guard in Slovakia, Arrow Cross in Hungary, Iron Guard in Romania, and Ustase in Croatia) would sell out their old bosses for their own gain -- and they would get to keep beating up political opponents such as liberals, conservatives, and democratic socialists as they did for fascist regimes.
I can imagine American fascists collaborating with Islamofascism because for authoritarian types, culture is not so precious as is t5he desire to exploit and abuse people. Communism? Commies found that rank-and-file members of the fascist militias (Hlinka Guard in Slovakia, Arrow Cross in Hungary, Iron Guard in Romania, and Ustase in Croatia) would sell out their old bosses for their own gain -- and they would get to keep beating up political opponents such as liberals, conservatives, and democratic socialists as they did for fascist regimes.
The ideal subject of totalitarian rule is not the convinced Nazi or the dedicated Communist but instead the people for whom the distinction between fact and fiction, true and false, no longer exists -- Hannah Arendt.