I went to lunch. The dish (Rigattoni a la Norma) w...

I went to lunch. The dish (Rigattoni a la Norma) was correctly prepared and the service in the restaurant was - equally - correct. However, upon entering (it was 11.30) I asked if it was already open - implying that my question was for lunch. The attendants were extremely rude saying it was obvious that it was open, if not, how could you have asked ...