If you're opposed to a surveillance state, you should care deeply about preventing future terrorist attacksYou can't prevent them all, and I don't want you to try. More precisely, I don't want you to do what's necessary to prevent every likely form of attack.
Terrorist attacks in the USA happen when a few nutcases get lucky and succeed in wielding disproportionate force in an asymmetrical fashion. Only a ubiquitous Panopticon of a police state has a chance of stopping them all. In infosec terms, patching all of the vulnerabilities will require us all to live sandboxed lives far away from the metal, and that's not what this country was supposed to be about.
So, go find something else to do, please... or at least, someplace else to do it. Failing that, maybe name your company after something besides a powerful magical artifact that was captured and subverted by malicious forces. The real terror will begin when the next J. Edgar Hoover takes control of what you've built.
If you want to roll back the surveillance state, you have to actually empower people carrying out anti-terrorism to intelligently correlate data gathered through lawful and privacy-respecting means to succeed in their mission
Bullshit. The authorities had all the data they needed to stop terrorist acts from 9/11 to the Boston Marathon bombing. They needed more brainpower, not more CPU power.