how do you reply to "everyone's gluten intolerant because of how america's wheat is processed"

or any similar statements. i get hit with this statement all the time and it's exhausting. i'm not celiac, but i do have an immune response to gluten. i'm pretty confident my body isnt just anti-american wheat but rather anti-gluten in general, but no one seems to believe me and its tiring having to justify my dietary restriction.