Only because we have been meddling w/ them...whether it be putting The Shah into power back in the 50's or 60's, putting our military bases on what Muslims consider to be holy soil, having our Marines in Beirut, our involvement in Iraq (@ least twice that we know of), & who knows what else. Had we taken George Washington's advice decades ago, we wouldn't have had to deal w/ what we have now.
Muslims consider all their soil to be holy. Big deal.
Islam is not a religion, it is a political death cult.
Muslims are offended by the very act of breathing by infidels like us.
And who has the US fought the wars of the last 20 years on behalf of?
Oh yeah, Muslims—freed Kuwait, freed the Kurds, freed Iraq, freed Afghanistan—twice—once from the Russians and once from the Taliban. And help the Kosovans and Bosnians.
The US and the Muslims go back a long way, since before 1805. They meddled with us first.
We need to meddle with them last.