Why do you think those questions are stupid?
Asking me if I'm a spy? Has anyone ever answered yes?
Not sure why that would matter when you're also getting arrested for spying / committing a terrorist act, but whatever.
My family was searched and questioned crossing into the US from Canada, on our British passports. The American relatives we were visiting were unimpressed.
I've since had the stupid questions. "It says you're going to a science conference. You don't look like a scientist." "Why is your passport empty? Don't Europeans travel a lot?"
The Nazi question is still relevant, if barely. There are still a few of them around.