I don’t usually focus on the fact that race is a social construct, because I think it can detract from the reality of our institutionalized racism. That said, I think if we white people read things like this and talk about the ideas, we could start some important internal and personal changes that might add to a foundation we need to help make structural changes in our institutions.
If you look at the #blackoutday tag on twitter it becomes really clear how race is a social construct. There’s no real way to “look black.” From the article:

Eliminating the binary definition of whiteness — the toggle between nothingness and awfulness — is essential for a new racial vision that ethical people can share across the color line. Just as race has been reinvented over the centuries, let’s repurpose the term “abolitionist” as more than just a hashtag. The “abolition” of white privilege can be an additional component of identity (not a replacement for it), one that embeds social justice in its meaning. Even more, it unifies people of many races.