If humans were meant to consume tree nuts, and peanuts in prehistoric times, than why on earth are some people are allergic to nuts?

In prehistoric times, people didn't eat dairy, or drink milk, and they didn't eat wheat. They only ate meat, nuts, and berries. I just don't understand why some people have nut and peanut allergies these days even though our early prehistoric ancestors didn't have that issue with peanuts and... show more In prehistoric times, people didn't eat dairy, or drink milk, and they didn't eat wheat.


They only ate meat, nuts, and berries. I just don't understand why some people have nut and peanut allergies these days even though our early prehistoric ancestors didn't have that issue with peanuts and tree nuts.


I want some answers please! Thanks!
Update: That's just like if humans came from monkeys, than how come some people these days have banana allergies. 🐒🍌
Update 2: They also ate vegetables too in prehistoric times too I believe.
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