The individual and the collective
The main individualist objection to collectivism is that group interests, and group action, are incompatible with the recognition of individual interests. The interests of individuals will always diverge from the interests of the group, and consequently groups can only subsist by repressing individual interests. The formal 'proofs' of this are questionable; people's behaviour is socialised, and people can and do collaborate for mutual benefit. Cooperation is both a means to common ends and an end in itself. Asserting the rights of individuals may lead to circumstances where majorities have to accede to minorities, but the converse may also be true: sometimes minorities have to respect the rights of majorities.