You must not kill any living being for the sake of your food.
The killing is the greatest sin
You must not kill any living being for the sake of your food. God has given enough vegetable food that contains all the ingredients present in the non-vegetarian food. After all, the source of ingredients of any flesh is only vegetable kingdom only. Eating the non-vegetarian food is not a sin because same ingredients exist in both vegetarian and non-vegetarian foods. But, you have to kill a living being for the sake of non-vegetarian food. The killing is the greatest sin.
You may argue that you have not killed the living being directly. Such argument cannot stand. Since you are eating the non-vegetarian food, the living being is killed. You are responsible for its killing. Therefore, you are the principle shareholder of the sin. There is nothing wrong if you eat a living being after its natural death. In Hinduism, there is a sect of people called 'Kapalikas', who eat the dead living beings. Therefore, they do not acquire sin. The tsunami is always due to anger of God since you are killing the living beings present in water for food. The earthquakes are due to killing of living beings that exist on the earth. God in the form of Buddha and Mahavir preached the non-violence and severely opposed the killing of living beings.
God in some other human forms might have followed the practice of non-vegetarian food in order to join with non-vegetarian people so that, certain other higher aspects to be preached might have been taken into consideration. That does not mean that God has encouraged the killing of living beings through non-vegetarian food. He might have kept silent on this issue in order to give importance to other serious issues. God follows the ignorance of the students in order to become friendly with them. To control a running bull, you have to run along with it for some distance before controlling it.
All these are the basic concepts of nivrutti, which are the core of pravrutti. By following the ethics of pravrutti, you will avoid God becoming furious with you. Then, through nivrutti, you can please God. On one hand, you are making God furious by not following the ethics of pravrutti and how can you please God through nivrutti simultaneously?
Universal Spirituality for World Peace