Your "objectivity" is screwed up, to put it bluntly.
Okay, I'll concede that there is a qualitative difference. There are certain societal effects that go along with being hit in your homeland. The long-term effects of having a war on their territories stunned both Germany and Japan for at least 20-30 years. Of course, the conflagration that those two nations earned for themselves was much larger than the WTC.