The problem is that it wouldn't have been as symbolic as hitting Big Ben. The idea would have been to hit a symbol of the country, so as to intimidate us. But my feeling is that we wouldn't be intimidated. We share a common heritage, and in that, I'd say we'd be as angry as you would be.
Regards, Ivan
Just one correction: change the "as angry as you would be" to "even more angry that you are already." And given my rage, it'd be impressive, I tell ya.