In Indiana, home of Mike Pence and his hierarchical Republican agenda, Pleasant Run Elementary students had just won a robotics challenge at
 Plainfield High School,  with students new this year to the  competition. this 
year. Two of the team members are African American and three are Latino/a.  The team is made up of 9- and 10-year-olds.
“Go back to Mexico!” two or three kids screamed at their brown-skin peers and their parents, according to some who were there. This
 verbal attack had spilled over from the gymnasium. While the children 
were competing, one or two parents disparaged the Pleasant Run kids with
 racist comments — and loud enough for the Pleasant Run families to 
hear.
“They were pointing at us and saying that ‘Oh my God, they are champions
 of the city all because they are Mexican. They are Mexican, and they 
are ruining our country,’ ” said Diocelina Herrera, the mother of 
PantherBot Angel Herrera-Sanchez.
Here is a steamroller effect of people who support hierarchies. People in lower groups get a little, and the top group feels they are taking over. 
http://www.usatoday.com/story/tech/nation-now/2017/03/17/robotics-competition-racism/99301384/
