I suppose all lives mattered throughout the Native American genocide, the enslavement of Africans, the Spanish-American War, the treatment of Orientals during the construction of the railroad, the treatment of the Irish, the treatment of Germans during WWII, the Japanese internment camps during WWII, or any other institutional racism...
...but suddenly when someone said maybe black lives matter too, #AllLivesMatter started coming out of the woodwork. Coincidence? I think not.