President Obama excels at exculpatory language when it comes to militant Islam, as do most quisling European political leaders.
Western politicians' unwillingness to use honest language regarding the threat of Islam in general and militant Islam in particular is perhaps driven by an unwillingness to differentiate between "us" and "them". As such, it amounts to a cultural death-wish.
Mark Steyn, as always, is one of the best sources for clear-headed analysis.