Animals kill to eat. Humans fight wars and kill just because.
As for your last para, I don’t intend to debate religion. But this is Philosophy and Spirituality forum. Not.religion forum. Secondly, per your religion, this ought to be subdued. So what? That is just your religion. Not everyone in this earth subscribes to your religion. Multiculturalism is the norm.
Now if you had made this argument is the Religion forum , I would not make above comments. But the lines between Philosophy and Religion have been blurred by such comments. Both have as much to do with each other as Apple and stone.
Your last sentence is also the best case one can make to keep religion out of govt.