Right on! I think it's stupid to have ever thought we were 'safe' before anyway. The world is brutal and some of the people in it are animals, but that don't mean the world's off-limits; if anything, it means 'get up off your ass and make the world around you a better place'. America is the 'Home of the Brave' not the 'refuge of sissies', that's France.
The way to win this "war" is by not doing a damned thing different today than we did yesterday here at home, and to pound anyone even remotely associated with the responsible parties into dust with our military.
They chose to murder our civilians by the thousands, wholesale slaughter then it is.
Look to the past, to Japan and Germany.
We destroyed their armies, killed their leaders, and fire bombed their cities.
Freedom is neither easy to maintain, nor without cost.