the.com/intolerant
A door that only opens one way, and only for itself.
means Unwilling to accept beliefs, behaviors, or people that differ from your own — or, biologically, unable to digest something without consequences.
from From Latin intolerantem, fusing in- (not) with tolerare (to bear, endure) — literally the inability to carry the weight of difference.
Double dutyApplies to opinions and to lactose alike.
Tolerance paradoxPhilosophers argue tolerance must reject intolerance to survive.
Body politicsGluten and dogma both trigger flare-ups.