Is war ever really "good?" I suppose there are "good" reasons to fight a war but I feel very ambivalent about calling any war "good."
Working at the World War II Valor in the Pacific National Monument at Pearl Harbor, Hawaii, I have read many books, done a great deal of research and talked to many veterans of World War II in the Pacific including Pearl Harbor survivors. I'm not sure the war could have been prevented but what I have gleaned from much of the writings is that it may have been possible to, at least, shorten the time period and/or lessen the loss of life and damage.
Someone once said something to the effect "wars are started by governments but fought by the ordinary citizens." The actions of governments, if known by all of its citizens, would probably not meet with their approval in many cases. The United States government had done a great deal to "set the stage" years before the Japanese government decided to attack us at Pearl Harbor. Additionally, we had received several forewarnings which we chose to ignore either through miscommunication, disbelief or hubris. Neither the United States government nor the Japanese government is innocent but its their innocent citizens that bore the burden and suffering of the war, a war where approximately 30 million people lost their lives and countless others were injured and/or lost everything.
War is tragic, not "good." I believe if we all, no matter where we live, change our language and consider all wars, no matter what the cause, as tragic, disastrous, unnecessary, useless, and never use words like good or great or the like, we may eventually stop and reconsider that there may be a much better way to solve our differences.