Of course it is. Only a fool thinks otherwise.
Let’s say you were witnessing someone being brutally raped, and there is no way to get the police there before it happens. You could stop the assault by firing a gun at the attacker. What is the moral thing to do?
Well DUH! The only moral thing to do is to violently stop the attack. Yeah, violently. Hopefully with a weapon (even if you are wicked tough you might get injured or incapacitated in the scuffle, and THEN where would the innocent victim be?). So there is one instance that took me about a millisecond to think of where violence is the right thing to do. So don’t give me some mindless crapola about how one is never supposed to be violent. That is simply not true, and every thinking person in the world knows it.
I think that one should avoid force and violence as much as possible. One should slaughter a hog with regret. But violence is indeed the right thing to do at times. I like hamburgers as much as the next guy. The fact that I pay someone else to slaughter the cow by no means clears me of moral responsibility. If slaughtering a cow is immoral, so is eating a hamburger. And vice-versa. If eating a hamburger is NOT immoral, neither is slaughtering a cow.
How you know what to do yet again brings us to the root of all morality–epistemology.