Black lives matter -Explained

Over at the intertubes, one redditer had a wonderful way of explaining racial inequality and the need for a 'Black lives matter' movement. I quote the full text (with minor edits), so you don't have to visit Reddit and spend the better part of 6 hours jumping from one sub-reddit to another.

Imagine that you're sitting down to dinner with your family, and while everyone else gets a serving of the meal, you don't get any. So you say "I should get my fair share." And as a direct response to this, your dad corrects you, saying, "everyone should get their fair share." Now, that's a wonderful sentiment -- indeed, everyone should, and that was kinda your point in the first place: that you should be a part of everyone, and you should get your fair share also. However, dad's smart-ass comment just dismissed you and didn't solve the problem that you still haven't gotten any!The problem is that the statement "I should get my fair share" had an implicit "too" at the end: "I should get my fair share, too, just like everyone else." But your dad's response treated your statement as though you meant "only I should get my fair share", which clearly was not your intention. As a result, his statement that "everyone should get their fair share," while true, only served to ignore the problem you were trying to point out. That's the situation of the "black lives matter" movement. Culture, laws, the arts, religion, and everyone else repeatedly suggest that all lives should matter. Clearly, that message already abounds in our society. The problem is that, in practice, the world doesn't work the way... Societally, we don't pay as much attention to certain people's deaths as we do to others. So, currently, we don't treat all lives as though they matter equally.
Just like asking dad for your fair share, the phrase "black lives matter" also has an implicit "too" at the end: it's saying that black lives should also matter. But responding to this by saying "all lives matter" is willfully going back to ignoring the problem. It's a way of dismissing the statement by falsely suggesting that it means "only black lives matter," when that is obviously not the case.

In summary, saying "all lives matter" as a direct response to "black lives matter" is essentially saying that we should just go back to ignoring the problem.