I have to question your statement “a serious sin for anyone who eats real tacos”. Was this in reference to the double tortilla? Or the fact that the tacos weren’t toasted? I lived in San Diego for many years and ate regularly at countless authentic, Mexican taquerias and tortillas are never ever toasted for tacos and more often than not you get two tortillas per taco. The idea is to eat the first one and whatever fillings you lose can then be eaten as a second taco as they fall into the other tortilla.