Tamāla Kṛṣṇa: "Only the Lord can manufacture a system of religion. The Vedas are also accepted as originally spoken by the Lord Himself to Brahmā from within his heart. Therefore the principles of religion are the direct orders of the Supreme Personality of Godhead. These principles are clearly indicated throughout the Bhagavad-gītā. The purpose of the Vedas is to establish such principles under the order of the Supreme Lord, and the Lord directly orders at the end of the Bhagavad-gītā that the highest principle of religion is to surrender unto Him only and nothing more."
"The Vedic principles are to push one toward complete surrender unto Him, and whenever such principles are disturbed by the demons, the Lord appears. From the Bhāgavatam we understand that Lord Buddha is the incarnation of Kṛṣṇa who appeared when materialism was rampant and materialists were using the pretext of the authority of the Vedas. Although there are certain restrictive rules and regulations regarding animal sacrifice for particular purposes in the Vedas, people of demonic tendency still took to animal sacrifice without reference to the Vedic principles. Lord Buddha . . ."
Prabhupāda: Just like still, animal sacrifice . . . not only the followers of Vedas, every religion—animal is killed or sacrificed under certain religious rituals, in the lower stage. In the higher stage there is no such animal sacrifice. Just like this Kṛṣṇa consciousness movement, there is no ritualistic process as animal sacrifice. But the Vedas, they will include everyone. Suppose one is addicted to fish-eating or meat-eating.
So the Vedas do not reject him also. He gives him direction that, "You . . . all right, you can eat meat, but not you can start slaughterhouse. You can sacrifice one goat in the presence of Goddess Kālī, and then you can eat." That means restriction. Goddess Kālī cannot be worshiped daily. So at least he is forbidden to eat daily meat. That is the idea.
Just like liquor shop is allowed by the government because there are drunkards. They must drink, but under restriction. You cannot keep liquor or wine more than the necessity. There is restriction. In India especially, there is very strict restriction. So similarly, the Vedic principle is to restrict sense gratification under certain rules and regulation. So the animal sacrifice is also restricted in that way.
But when people become too much animal-eater and simply giving the evidence of Vedas, "In the Vedas it is sanctioned," but without caring for the ritualistic process, at that time Lord Buddha appeared. It is said about Lord Buddha that sadaya-hṛdaya-darśita-paśu-ghātam (Daśāvatāra-stotra 9).
The Lord appeared as Lord Buddha, being compassionate on the poor animals, unrestricted.
So this animal-killing, no religion sanctions. In your Christian religion also, it is clearly stated, "Thou shall not kill." But who is caring for that? Nobody is caring. They are killing. Their killing process is increasing, and there is reaction also. Every ten years you will find one war, killing process upon you. How you can avoid?
There must be reaction. You cannot violate the laws of God. As you cannot violate the laws of the state, similarly, if you violate, you have to suffer. You cannot expect peace and you go on killing animals. That is not possible. If you want peace, then you must think for others also. That is Kṛṣṇa consciousness. That is God consciousness.
How you can kill another animal? He is also as good a child of God. A father has got some dozens of children. It may be one is useless, but that does not mean father will allow it to be killed . . . allow him to be killed. If the very intelligent child says: "My dear father, your . . . this son is useless. Let me kill him," the father will sanction? No, never. Similarly, the animal may be less intelligent. They cannot make protest. They are also nationals.
What do you mean by national? One who is born in America is national. Are the animals are not born in America? Are they not American nationals? But because they cannot make protest, they cannot make meeting, you are killing them. You see? Is that humanity? And you expect peace? That is not possible.