There needs to be an additional step when interpreting constitutional law.
"Is the result absolutely stupid?" If "Yes", then that is not what it means.
I agree, but the "absolutely stupid" can't just be a difference in whether or not something is good policy. That's what judicial activists do - "your interpretation would be really bad policy so our interpretation is correct." And the sad truth is that there are plenty of people who think birthright citizenship for illegals is good policy. The only actual virtue I can see is simplicity of administration.