how? it only represents a kind of relationship (a terrible one, yes) between people. But it's only a historic terminology.
Killer is a word that, following that logic, has negative connotations and it is used when people say "that's a killer feature". Stopping using those terms won't make past events to disappear. At worst, they'll be forgotten, making it possible for history to repeat itself.
But let's run with "killing" for a bit. If, hypothetically, you had a coworker whose family was murdered by a serial killer, wouldn't you be careful about using “He killed it out there” and similar terms around them? Or do you sit around logically proving why the context is different?
Ok. But. The discussion is about specific expressions almost everybody knows, not just random words. One of those words is `slave`.
> It looks to me more sensible and a better long term solution to help this person to deal with his/her emotions instead of trying to change everybody around them.
I think this only applies to situations in which one specific person has specific triggers who are e.g. tight to an psychological trauma...
While the term holocaust mainly refers to what the Jews went through during WWII, slavery encompassed not just blacks, but many other races including whites. The problem here is that the "discussion" happening is extremely US centric, that non-Americans are either looking at it as absurd, or they've become so Americanized that they think it's correct, meaning they also have no proper critical thinking skills and are easily swayed.