You seem to answer your own debate
or are saying that , to let terrorist kill and murder when ever they want ? ?
Your question presupposes the only alternative to our current strategy is to do nothing. I reject that supposition and suggest there are alternatives available that don't involve the endless extension of conventional military power abroad or the commensurate erosion of liberties at home ...
Point being is that since terrorist are international , so therefor it is a global WAR.
And my point is that a WAR against "terrorism" is by definition (or rather, by the lack thereof) without end and poisonous to a democracy, and is therefore an unwarranted (not to mention self-defeating) response to the challenges posed by today's radical fringes.