The perp couldn't have been more casual about it in that video - sauntering along, then as they were about to pass each other by, turning and pushing whitey at the last moment.
Little Village is about 90% Mexican. I doubt seriously if the victim was white, but was most likely Mexican.
That 13% of the population seems to be 100% of the people pushing others on subway tracks.
These violent people seem to be another roid on the American landscape.