It’s got to be some kind of code or sending some kind of message of solidarity with the radicals imo.
Or, when he fails to reign isis in, he can claim he never said he would do such and such to isis, only isil. And the msm will gladly go along. Bank on it.
You may be on to something. Notice, as well, that Obama approved 2 rescue missions - one for the Yazidis and the other for the Iraqi Turkmen. Meanwhile, the christians are still on top of that mountain waiting for assistance.