LOL I live in So Cal, have been to Mexico numerous times, have eaten Mexican food thousands of times and have dated Mexican females. Sorry, but you have no fucking clue what you're speaking about here. I have eaten Enchiladas hundreds of times in my life and every single sauce was a tomato base, period. I also make them once a month if not more often.
You don't even know where to buy the sauce in your area, you're probably not a good person to argue about this. You can't find the sauce, and I have 4 taquerias within washing distance where I can go get them. I'm not saying you didn't have a sauce that wasn't tomato base, but it sure as fuck wasn't Enchiladas sauce. In the 70's my mom lived in St Louis and told me everyone put Ketchup on Tacos. So apparently nowhere outside of Cali, Texas, NM & Arizona know shit about how to make Mexican food.