Karma is Individual

One of the Buddha's major accomplishments was to establish a religion that doesn't depend on who you are or where you come from. His teachings were for everyone - regardless of tribe, caste, or nationality - who wanted to put an end to suffering. Since his time, those teachings have managed to spread throughout the world, transcending boundaries and divisions, because they treat people as responsible individuals, rather than lumping them into groups. They recommend that we evaluate ourselves by our own current actions, rather than by the actions of other members of the group into which we’re currently reborn.