My uncle had a large grape vineyard. He had a permit to kill deer also. We would go out at night and kill them in the orchard. (I rode along at age 10)
I killed my first deer when I was 12. It was very exciting. He jumped out in front of me and I got him on the first shot. But, he kept going. Down the ravine and up on the other side. Still standing, I shot a couple of more times before he disappeared. I ran down and then up and found him dead behind a manzanita bush. I had seen a lot of dead deer. I had watched many shot and skinned. But, this one was different. When I got to him and looked down, I did not expect to look into those eyes and feel the sorrow that I felt. That was the last deer, or squirrel, or bird that I shot.
Yes, the deer are a problem, just as are the Muslim terrorists and the Nazis in WWII. If I had to shoot someone in self defense or in defense of anther, I would do it. But, never will I kill an animal unless it is a danger to another living creature. Deer eat my tomatoes, but they don't eat people or my dog. Sin has made a mess of things. Soon it will be over. The lamb and deer will not be eaten by the lion any longer! And man will no longer kill.
Another thought. There is no need to kill to eat in most places in the world. I am having a hard time thinking of somewhere that it is necessary to kill to eat. But, there may be. If one is unwilling to kill to eat, then they ought not expect others to kill for them. I know some have allergies to some kinds of vegetables, but that is no excuse for killing an cow. An besides, the risk of contracting cancer, CJD, or Alzheimers makes it somewhat important to find one of the foods God designed for humans rather than having to kill an animal.
Interesting how our perspective changes when the Holy Spirit speaks to us. And, you don't have to be a Christian to know what is right and what is wrong.