Mental health requires healthy cognition. Healthy cognition requires:
1) the method of logic
2) objectivity (reality orientation & reason)
3) proper integration.
disintegrated mode of thought + worship of big government + delusions + obsessions + paranoia + transference neurosis + pathological projection + pathological irrational fears (phobias) + pathological emotionalism (hatred, anger, envy) = leftard mental illness
So they never became adults. Never matured. Never acquired wisdom.