Ignorance of True Knowledge is the Root Cause of Evil Mentality
It is clearly stated in the Bhagavad-Gita and other Vedic scriptures that there are two kinds of living beings. The divine and the demoniac. The animals, plants, and humans who do not know God as a person, come under the demoniac category. They are completely under the mode of ignorance. For the demoniac, God is unknown and unknowable, due their undeveloped consciousness.
“O son of Pṛthā, in this world there are two kinds of created beings. One is called divine and the other demoniac. I have already explained to you at length the divine qualities. Now hear from Me of the demoniac.” (Lord Krishna, Bhagavad-Gita 16.6)
Among the human beings, those who are in ignorance, will develop evil mentalities which will make them more sinful and eventually sink them down in the pool of material existence. In the animal and plant kingdoms. All plants and animals are ex-humans. This means the souls in the plant and animal bodies were once in human bodies, and now due to ignorance they are in the lower consciousness bodies.
Bad behavior is a symptom of degradation, which is caused by ignorance (lack of proper knowledge or no knowledge).
“Those who are demoniac do not know what is to be done and what is not to be done. Neither cleanliness nor proper behavior nor truth is found in them.” (Lord Krishna, Bhagavad-Gita 16.7)
The Vedic teaching is that life is an intelligent design, nothing happens by chance. The souls occupy plant and animal bodies, because they deserve it. Based on their desires and deserves, which they developed when they were in human bodies.
Those humans who are full of hatred, will try to destroy others, them selves and the world. Ignorance of true knowledge leads to evil mentality, which includes hatred.
“Following such conclusions, the demoniac, who are lost to themselves and who have no intelligence, engage in unbeneﬁcial, horrible works meant to destroy the world. ” (Lord Krishna, Bhagavad-Gita 16.9)
The degraded humans are those who think that unlimited sense gratification is the reward of religion.
“Taking shelter of insatiable lust and absorbed in the conceit of pride and false prestige, the demoniac, thus illusioned, are always sworn to unclean work, attracted by the impermanent. They believe that to gratify the senses is the prime necessity of human civilization. Thus until the end of life their anxiety is immeasurable. Bound by a network of hundreds of thousands of desires and absorbed in lust and anger, they secure money by illegal means for sense gratiﬁcation. ” (Lord Krishna, Bhagavad-Gita 16.10-12)
The result of following hate and atheistic (God is unknown and unknowable) ideologies is hellish existence.
“Thus perplexed by various anxieties and bound by a network of illusions, they become too strongly attached to sense enjoyment and fall down into hell. ” (Lord Krishna, Bhagavad-Gita 16.16)