Yes, ISIS is waging a religious war, but what percent of the global Muslim population does ISIS represent? Worse case would be 10% (that is certainly high). You want to blow up religious symbols which will generate even more support for them. You accuse the President of being a secret Muslim, even if he was so what? Yet you're the one promoting a strategy that would support ISIS. Think about the 2d and 3d order effects of what you're promoting.

Destroying religious symbols is little more than an emotional approach that would accomplish nothing militarily, and only serve to set us back politically. ISIS is waging a religious war, we are NOT waging a religious war just because one of our adversaries are. We are waging a war against AQAA. The religious aspect is critical, but that doesn't mean we need to engage in religious war, we just need to understand our adversary is and what that means.

Consider reversing your proposal, if someone blew up your church would you roll over and quit? Or would you mobilize and resist harder? History indicates most will pursue the second option.