The police kills more people in the USA then all terrorists combined (about 1000/year).
And we don't have another 911 may because of mass surveillance. Shall we try removing the surveillance to see whether terrorist attack increases?
Terrorism which is exacerbated by our own shadowy geopolitical agendas...
And it's ludicrous to say "We shall have a mass surveillance system or mass terrorism!", as if security theater revealed the actual effectiveness of such actions!
Do you love giving Leviathan the sword it stabs you with, the whip that scourages you, and the mouth which mocks your humanity?