I can't imagine Americans reacting much more aggressively than they did. Territory or State, Hawaii was US soil and everybody killed was a US citizen.
Now, it the Japanese had been able to follow up with an invasion and occupation of the Islands, this might be different. It's one thing for an enemy to wrest a non-voting territory from us, quite another to occupy a one of the 50 (49?) States. Assuming the Japanese followed their typical brutal practices in administering the island, there would be hell to pay when we got back at the Home Islands. Two nukes might not be enough.