I have "friends" (read: we mostly argue about this) who fit your description.

They will tell you that there are rules in place to prevent spying on Americans (and if you take a look at the Foreignness Factor screenshots, there is a sense in which this is true)

They will also tell you that the benefits outweigh the cost. Here we have a system that has allegedly caught 300 terrorists, and they would tell you that spying on foreign people to catch 300 terrorists is a good trade.

I disagree with them on both counts, but you asked what they would say.