They are. any insult is justified as long as its not racism. even if the insult itself, is worse then the message from racism.
Those remarks are acceptable now? Please try them on someone in the street, or imagine saying it during the 19th century, 15th century, any time in history, and the reaction of people.
For a large period of history, however, it was perfectly normal for one group of people to insult, enslave, mistreat or even kill another just because of their appearance, something they could do nothing to change.