People(noun)-
1.human beings in general or considered collectively.
2.the men, women, and children of a particular nation, community, or ethnic group.
3.the supporters or employees of a person in a position of power or authority.
If you say "ew,people" you are:
1. Disgusted to human beings in general.
2. Disgusted to men, women, and children of a paticular subset.
3. Disgusted by the supporters/employees of an authority/power.
"Ew,people" is then inherently racist.
You're racist to yourself.