Only if there is no other alternative. A person is allowed to defend ones family and their own lives, also the lives of others if so directed by their leaders. The leaders will have to take the blame for their decisions. Armed forces are under the direction of their leaders, except where a member of that force goes out and enjoys killing.
Your defense should be measures and proportionate.
In Islam, you are not allowed to kill anyone unless you are in a war, or if it is for self defense. And even in the wars, you are not allowed to hurt or kill the elderly, the woman, and the children.
Because I am an ignorant American who knows no law other then American law and some Canadian law, I will act as if you are in America. Yes, you are allowed to assault if you are attacked. In some cases, you are allowed to kill the person.
No. Jews are not allowed to eat or drink blood (Leviticus ch.3).
.................... ermm.. No, Muslims are not allowed to kill (or in other words, taking a life)
Yes, it is legal to kill a black bear in self-defense if you are in imminent danger and have no other means of protecting yourself.
Yes, it is legally permissible to kill a bear in self-defense if your life is in immediate danger and there are no other options to protect yourself.
Your question is not well phrased. The law allows someone to kill to defend themselves, they nevertheless still have to prove such a circumstance. Should a person be allowed to kill in self-defense? That is a personal choice.
Killing another person is always a last resort. However, one is usually justified in a justifiable war and in self defense and the defense of others.
There are special circumstances in which it would be acceptable to kill your neighbor; self defense is allowed, so if your neighbor is trying to kill you, that might require you to kill your neighbor first. However, in most situations it is considered appropriate to avoid killing people. Even if your neighbor is causing you terrible problems, there are other ways of dealing with those problems.
Yes, it is legal to kill a bear in self-defense if you are in imminent danger and have no other means of protecting yourself. However, it is important to check the specific laws and regulations in your area regarding self-defense against wildlife.
No, no killing in defense is not a sin. It's a sign of defense.