John Oliver did a show on this. It isn't that they are in favor of it, it is that they don't understand the implications. They think the spying is limited to just terrorist, not realizing that everything they do is being spied on.
I assume this is the same episode everyone was talking about but it's the Snowden one and the street interviews are pretty sad (as they always are).
My feeling is that most people would be against mass surevillance and anti-encryption posturing if they truly understood what was happening and what the imnplications were.
Unfortunately most people do not have a reason to learn about basic infosec during their daily lives and remain blissfully ignorant about it.