Before Vatican II--and admittedly after as well--the mental illness (sin?) of scrupulosity was a millstone bringing down Catholicism. 

It appears scrupulosity is back--or maybe it never left. 

If you care one iota about the ingredients more so than about the mystery, you devalue, trivialize, and degrade the greatest gift. If you believe in a God who gives a rip about gluten, you insult that God.  Or worse.