An actual example would be segregation of schools by race. White students had the better schools and education. So when segregation became illegal, it would be like a period where black students organized their own resources for catching up, their own space and time, etc. Now imagine they had just enough books/teachers for engaging those students. And then white students showed up and began using the books, asking for their own tutoring from the teachers, etc - leaving less for the students who were at a disadvantage to begin with. Then the white kids start crying when they are told they aren't welcome in this space dedicated to leveling the field of knowledge.

In summary: Jesus fucking christ a job fair is not like lynching, you fucking wacko.