authentic mexican food

I get really irritated when ever i hear people talking about how they just went and had authentic Mexican food. I get this way because i have yet to go to a Mexican restaurant that actually serves authentic mexican food. The number one way i judge wither or not the place does serve authentic Mexican food is by their enchiladas if they use flour shells they aren't authentic. They would need to have a corn shell to be authentic. I know this because I was raised around a bunch of Hispanics. My dads best friend is a mexican and my friend growing up moved here from Mexico.