You wouldn't be wrong...
No one has a right to deprive you of life, liberty, or your pursuit of happiness- as long as your pursuit doesn't violate the identical rights of others.
You are not wrong if you kill a person who is attempting to murder you.
The same goes for anyone who is attempting to violate your liberty or pursuit of happiness. For instance: no one has a right to insist on their right to molest or license you as your "price" of being allowed to travel.
You are not wrong if you kill someone who is trying to violate your liberty in any way. The burden lies with the aggressor.
That doesn't mean that it is smart to do so when those who most commonly violate your liberty and pursuit of happiness belong to a huge gang, who are somehow permitted to decide that you are never to be allowed to defend yourself from members of their gang, and who have claimed they get to "arbitrate" disputes that involve themselves.
But you wouldn't be wrong.
Someone trying to kidnap you? You wouldn't be wrong to kill them for their attempt. Someone making up rules that violate your property rights? You wouldn't be wrong to kill them for their attempt. Someone trying to enforce some rule that violates your rightful liberty in some way? You wouldn't be wrong to kill them in trying to stop them.
I'm not saying you "must", I am saying you wouldn't be wrong. You will be killed by the gangbangers for defending yourself from their "brother" gangsters- that is just a given. That's why it probably isn't a smart thing to do in the current situation in which we find ourselves. But never make the mistake of thinking someone is wrong for killing anyone who is trying to violate their life, liberty, or pursuit of happiness. If I were on a jury and you were "on trial" for killing a liberty-violator, I wouldn't convict you no matter how much I personally didn't like you if I saw that you were only defending your life, liberty, or pursuit of happiness from someone trying to violate you.
I would hope to be given the same respect, but I wouldn't expect it.