Is Violence Ever Justifiable?

Violence is rarely an effective means of solving conflicts. However, not to sound cynical but violence is an intrinsic part of human nature. As long as there is greed, corruption and war then violence will exist. War is horrible yet it occurs constantly. Ideally, violence should not exist in this world but evil breeds violence. It is incredibly naive to believe that violence should never be utilized. Typically when one violent act is committed then it will spiral into many more and it becomes like a cycle. The escalation of violence is extremely harmful for all those involved and affected by it. By no means do I condone violence but I feel in certain circumstances it is necessary. As long as peoples from different nations come in contact with one another then violence is inescapable. It is never really justifiable only unavoidable in certain situations. Even peacable nations have to resort to violence; a nation can only turn the other cheek for so long. Violence can be necessary in cases of self defense. Say if your family or livelihood is threatened, then you have every right to fight for and protect yourself or your family.
Truly evil acts are committed when people are bystanders and do nothing about the atrocious actions of others. During the holocaust many people sat back and did nothing as Jewish people were being taken away. Since they weren't being targeted then they felt it was not their problem. Eventually, more and more people were taken away until no one was left to stand up to the Nazis. Violence is very complicated because no one should ever want to use it but sometimes we are left with no other option.
I do sympathize with the Allmuseri to an extent. They were forced into a harsh environment against their will. They were also basically deprived of their humanity. It does make sense that they would want to react violently. In a way their violent retaliation was a result of their environment and the conditions they were living in. It was something that would inevitably happen if they were given the opportunity. The Allmuseri lost a part of themselves when they did engage in violence and they essentially brought themselves down to the "white man's" level by doing so. This goes to show that violence never breeds anything positive.