They have not blown up any churches here, because their goal is not to establish a Caliphate in the US.
They recognize that the enemies of founding a Caliphate in Syria and Iraq are all those who are not fundamentalist Sunni Muslims, which include Christians, Druzes, Alawites, Shiites, Kurds, Turkmen and anyone else that does not yield to their plans.
I really doubt that they have any intention of blowing up the First Baptist Church of Cooterville, GA.