IMO probably France since it’s the only country in Europe where migrants are 0% assimilated and actively consider themselves a hostile foreign entity. Even roadmen and shit in London nominally adopt a local identity that’s tied to England. Most niggers and muslims in France hate baguette eaters and never interact with them or anyone outside of their own ethnic cliques even when their family has lived there for 3 generations. So as soon as they become the majority they will probably start a civil war to destroy France which will lead the white government to kill or expel all nonwhites
