The people who have nut allergies, and the people who don't want the people with nut allergies to die, and the people who don't want the people with nut allergies to feel socially excluded, and those that feel some social obligation not to kill the guests at their child's birthday party and a further fuzzy group of people who have other allergies or preferences or care about people who do, or follow some kind of "do unto others" morality is probably quite large.
And the cost of skipping nuts (as he discusses) is fairly minor, even to people who would actively like to kill anyone with nut allergies.
So, how does "dictatorship of the minority" deserve that title?
And how did we get from there, via some name dropping anecdotes, to "western civilization is commiting suicide"?