Friedrich Nietzsche (PBUH) wrote that the jews ("priestly caste") created slave-morality systems (christianity, liberalism, marxism, progressiveism, feminism, etc.) which are designed to 'transvaluate Aryan values' (the Aryan virtues of strength, power, honor, and individualism are replaced with pity, guilt, weakness, self-hate), as well as deconstruct the ancient Aryan caste system, and that these slave-morality systems empower the lowest caste Europeans ("chandala") to hold the higher caste Europeans in judgement.

In short, through these slave-morality systems the lowest caste (chandala) becomes self-deified and they can gain moral and social supremacy over the aristocratic and warrior castes if they don't follow their set commandments/virtues.

So, the "priestly caste" (jews) set an agenda, and if the goyim Europeans object they label them "heretics" and the chandala footsoldiers destroy them on command thinking this gives them moral and social supremacy over them.

It was through this divide and conquer system that the jews conquered Europeans.