@AlabasterBrick @matty You're mixing tribal identity with collective, they may seem the same in theory but they're closer to opposites in practice. The more people around you, the more dependent and absorbed into the collective you are, the less obvious your identity becomes, even without multiculturalism.
Individualism doesn't mean you don't have a solid group, just like competition doesn't mean you stop cooperating, it actually works the opposite way. Your enemies are collectivists.