The two houses of Islam —
The House of War — for all those who do not submit to Allah
The House of Peace — for all those who submit to Allah
Islam is a religion of peace — once you submit to Allah, the wars will stop, and you can live in peace as a good Muslim.
If you get stubborn and do not give Muslims everything they want ... well, at the end of that road, there is nothing but War.
Obama knows these things.
Except that Muslims fight against each continually as well.