Why is rage induced through retarded dietary habits??!

Why do we become so rage-filled when we see somebody post about being a picky eater in some retarded way, such as not eating vegetables or not liking the taste of water? Is it some deep-seated evolutionary instinct?

>>1
Evopsych: we see ourselves as tribes, everything that makes one an outlier reduces the chances he is "in our tribe" and therefore he is "the other", "foreigner","alien","potential enemy","traitor".

Its one of the central ideas of group psychology:
https://en.wikipedia.org/wiki/Minimal_group_paradigm

>>1
Because acting like a child in adulthood is harmful. Mockery begets change