Do not harm animals

My friend told me that he is now no longer harming animals. Why made him doing this is because he had watched the film " Why we should not eat animals? "
We can see how cruel human beings treating animals.
1. Killing shark-Fishermen use the sharp knife to cut the shark fan. After that, they put back the injured shark to the sea. The shark will surely suffer many hour before death.
2. Killing sea lion-The hunter use the hard stick to beat the sea lion. After the sea lion is motionless, the hunter quickly cut the sex organ. After that, the hunter throw the sea lion to the icy water. Wow, can you imagine how suffering these sea lions have to endure before death?
3. Killing whale-use the big net or using canon to kill the whale. Let the whale drowning until death.
4. Killing monkey-cut away the top of head and eat the living brain. The monkey keep on screaming.
We can see how cruel human beings. All these people with no compassionate heart are the pitiful people, why?
They will surely get the cruel treatment somewhere sometimes. Why? The law of nature will not spare them, these killers will get the fair treatment and have the chance to experience the pain or great sufferings one day because they ask for it.