I once heard from a Jain guru in Mumbai, on this very topic. He said, why he hated Krishna
- Krishna was a cunning person of humble Dravidian origin.
(his physical features were : Black skin, curly hairs, fat lips etc.)
- Krishna brainwashed Arjuna into killing own Aryan clan peoples, in the name of “Dharma yudh” (holy war). And thus how Aryan kingdoms & kuru, huns, hepthalites dynasty in norther part of India, got decimated & mixed to extinction)
- Krishna , in the name of Leela, procreated with aryan kulin girl Radha,Source : Physical description of Radha was white, beautiful charming face (Caucasian/indo-aryan type, most probably)
- he was a race-mixer despite the fact that he talked a lot about varna-shankaram (race-mixing) & crossbred-ism a lot in Gita. All his statements are hypocritical.