I had a feeling you would flinch when I said that.
I understand that going to Mexico should not be necessary...but it is a Mecca for alternative treatments and the information about them is there. In the words of Wade Frazier, in the chapter of his essay called "The Cancer Racket",
"How free are we in the United States.....? Mexican citizens enjoy far more freedom in choosing their cancer treatments than Americans do. How can Americans choose their cancer treatment when they are not even aware of the alternatives, and if they are ever mentioned, it is usually in the context of its practitioners being jailed and demonized?"
This is highly speculative of course, but his parents might have been savy enough to use diet, but not savy enough to know what else to do and were being guided by someone who was overly confident or also didn't know about things like Oleander and 714X either.
Poor little Noah. Little did he know his death would be a pawn in their game...