For the record, I believe all lives do indeed matter, and I believe the African American community has been kept at a lower and different standard than the white community; a discrimination I cannot understand fully, but I still know is wrong. I have no problem with Black Lives Matter. The real crime is how we allowed their lives to be so neglected for so long.
Most people I know who say "all lives matter" are only doing so as a way to dismiss Black Lives Matter. What they don't want to hear, or do hear and just want to silence the outrage, is the undeniable history of racism and bigotry that has lead the African American community to finally say enough. The black community has been screaming for decades about unfair treatment at the hands of law enforcement, prosecutors and the courts, and white America went about their business, ignoring them.
It's the prolific abundance of cell phone cameras which is showing the real story. The African American community was telling the truth; they are being treated differently, many times with fatal consequences. The horror is obvious to everyone, even the most racist of fools.
I was getting ready to start screaming and typing less than flattering things to the "all lives matter" trumpeters, but Bill Corbett, from RiffTrax and MST3K fame, sent me a link to a piece on the Reddit "Explain Like I'm Five" board from GeekAesthete which addresses this in a calm and rational manner, with incredible simplicity. It's so good:
If only it was that easy.