It makes them bigoted or evil because people likely said the exact same things about their ancestors (unless they are descended from native americans or the original british colonists)

http://www.ushistory.org/us/25f.asp

https://www.theatlantic.com/national/archive/2011/11/racist-...

Quoting the first line of the Atlantic article:

"There was a time in America when the Irish were characterized as apes, Italians as street filth, and Chinese as parasitic locusts."