I know very well of the history of the word, but times changes. The meaning behind the usage of the word counts, trends change in how people speak and so on. Preferably, I would like to see the word disappear, but realistically speaking if you are actively getting triggered by someone saying nigger you simply are weak-willed. When someone insults me, I just roll my eyes over and move on, why should someone go crazy because of the word nigger?
The fact is, the more time goes on, the less impact the word as, it's already been used for edgy humor, including from my own black friends and used towards the same friends while they just laugh at it.
Pewdiepie is not perfect, he's surrounded by the same gaming culture that probably has said the word countless times as a joke, and he just happened to adopt it unconciously.. just to let it slip on stream and immediately regret it. Anyone who makes this a bigger deal than it needs be needs to review how they see life because they are way too sensitive or they really love to jump on bandwagons, or they have an agenda (see WSJ).
Let's grow up as a community and judge people on actions rather than singular words. I've seen and condemned a lot of racist shit, especially in this day and age where the racist alt right seems to be rising in popularity on social media (Which i regularly try to attack/correct on fb), but I have never seen a single thing that has led me to think that pewdiepie is a racist. The world will be a better place if we stop caring too much about little things.