[atomicity]

This is downvoted but I found it interesting that the English word "slave" is derived from Slav.

From the Wiki article [0]: "In medieval wars many Slavs were captured and enslaved, which led to the word slav becoming synonym to "enslaved person

https://en.wikipedia.org/wiki/Slavs_(ethnonym)

For the same reasons people argue against abusing terminology like "retard" or "gay", you could argue that using the word "slave" affects people's perception of Eastern Europeans.