Obama denied Islamist terrorism (not 'concept') attacks for eight years. Fact. 

So now here we are, left to try and clean up that growing movement today.

As for the rest-> "Where were you when all this was going down? Trying to find the letter L on your keyboard?" <- what the heck are you talking about and how does it apply to this latest mass murder rampage against non-Muslims by Islamist Muslim terrorists?