Um yes... It could have something to do with the fact that we started two wars on the other side of the planet, at the same time.
Yes it was a damaging and demoralizing attack on 9/11. Yes it was a shock to the world. But maybe involving us in occupying two countries at the same time for almost 10 years straight, costing thousands of US soldiers their lives, was a bit of an overreaction.
Perhaps they could have toned it down a bit and maybe stuck with just one bloody occupation instead of two?