The people of Oahu were citizens of the USA and were supposed to be under the protection of the US government. That government failed, and they were the victims.
Anyone who thinks the Japanese just got out of bed one morning and said, "I'm bored, let's bomb Pearl Harbor, is living in a fantasy world.We gave them good reason to hit us, and they did.

Bush did the same thing in Iraq without a declaration of war.That's some precedent he set for the world.
We like to think we are Mr. Clean, a paragon of virtue and a role model for the world, but when we remove the rose colored glasses, we see a different story.