I understand that you were offended, but there's really no need to be.
They are simple questions. Likely answers are
No, I use modern plumbing.
Yes, I light the fire in my furnace on the Sabbath.
But then, such answers would show that one is deciding for oneself which laws to keep.
He was feeling uncomfortable about where the questions where heading so he decided to take offense and avoid simply answering the questions.. It was a dodge..
