My guess is that if your district has too few "minority'' students they will start bussing them in from more "cultural'' neighborhoods.
That makes it sound like you don't want ethnic groups to be in the US, is that right?
Why should they be?  They are just taking space from the white majority.  The US is a majority white country, so it is only natural they would want their majority to increase.  White people are superior anyway, so obviously they deserve more space.
Talking about minorities like that and claiming that white people are somehow better than other races is dangerous and very harmful. If everyone believed that, people would be attacking minorities constantly. You should try to be more open minded toward people of other races.