Here is a helpful post from [1] MEMRI collecting together all the Al-Qaeda communiques about the recent suicide bombing in Amman. Why did they target hotels in Amman?

"From these hotels, the [2] Crusaders also operate the bases that they have established on Jordanian soil in order to train cohorts of apostates for the army of the infidel government in Baghdad. Consequently, they have turned into meeting places for officers of the so-called 'NATO Alliance' which supervises these bases in order to turn the Muslim land of Jordan into a safe rear base for the armies of the Crusaders and deserters of the faith, [a base from which they] set forth to Iraq in order to kill Muslims, shed their blood, and violate the honor of their women, while the Jordanian scoundrel and others shed crocodile tears over them. Thanks to the wall of security around these hotels, they have become safe breeding grounds for the filth of Jewish and Western tourists, who spread their licentiousness and lechery at the expense of the blood and suffering of the Muslims in this land.

There is much more. Read it all.