I hugely disagree with the way that white supremacism has had it's definition widened within certain circles and how those circles are now attempting to push that definition into wider usage through the type of bullying that's on display in this very article.
For most people white supremacism conjures up images of nazi germany, the slave trade, jim crow, lynchings, the kkk, etc. Our society today does not resemble those in such a way that we should begin using that word to mean something totally different. It feels like an awful rhetorical trick where the emotional resonance of the older meaning of the word is felt by everyone each time it's used while meaning something far more subtle. We're dealing with something far more complicated today, and no number of performative denouncements will help us solve our problems.