Japan bombs a military base, killing around 3,000 people, so we drop two nuclear bombs on large civilian population centers, killing around half a million people and putting 15m out of their homes in Japan, and put Asian Americans in concentration camps?
Saudia Arabia Crashes two planes into two buidings, killing 3,000 people, so we start an endless war with pretty much every country in the middle east EXCEPT Saudia Arabia, and kill like a million people?
Sounds pretty proportionate to me.