The real, unstated reason that the left hates J. B. Peterson is that they know Jung’s thought contained a racial component that was occulted postwar. The left fears Peterson will lead people back to this. That is why they are so vehement in their accusations. They see the danger
The left are correct to be afraid, actually. The accusation of “racism” when hurled at Peterson is directed to this deeper aspect of his thought that is obscured by his liberal presentation. People on the hard right don’t realise quite how significant Peterson is.