That’s why it’s a tricky balancing act. Groups reclaim words that were used against them to take away that negative meaning, and turn it back into something positive. But at the same time, there often are still those out there who use that word in a hurtful way. Also, that “original context” is often not even terribly original in the first place. Such as in this case, where the word in question is simply a corruption of a word that simply means “black”. So the original context is benign, but it subsequently developed a bad connotation through imperialism, and bigotry, with the notion that black = inferior. Obviously, for many of us, it does not have that connotation. But it is prudent to remember that it is still used by bigots.
I am definitely in the “reclaim all the words” camp. Reacting to a word choice on a visceral level would mean that I am not in control of my faculties, and not being truly critical. I see it as analogous to vaccinations, where small controlled exposure in a positive context can prevent one from being overwhelmed later in a less-favorable context. And if somebody is being a douche, I prefer to call them out on their actual ideas and positions rather than them “using the wrong word”.