Well it is not a war, but they do it in defense.
It's not even a war it's a one sided fight where u have no arms and legs and u fight the top UFC fighter
Its not self defense when you are an occupying power that is stealing land from the indigenous population and denying them their rights. Its essentially if a someone who was being robbed tried to grab his wallet from the robber, and the robber then pulled out a gun and fired. Does the robber have the right to claim "self defense"? NO!