Well, I guess that settles it, then! There's no way their job is broader in scope than what they publicly say. I'm convinced.

Where have you been the last few years?

I'm usually not this snarky... but seriously... it's fact NSA operates an enormous surveillance infrastructure within the US borders targeting US citizens.

That is not debatable.

What may be debatable by some, is whether or not it's legal/constitutional/moral... but you are not making that point.

You're right that it is not debatable. It's simply false. There is no evidence that supports your claim of the NSA operating enormous surveillance infrastructure targeting US citizens. The one program that Snowden leaked that included US citizen data (phone metadata) has since ended, and the way that metadata was queried according to Snowden's leaks does not constitute surveillance.

You'll never win with facts, unfortunately: the only things that sway this crowd are half-truths, falsehood and innuendo.