Stopping America's next hate-crime killers on social media is no easy task
The pattern is clear: Hate-filled manifestos posted on websites populated by white supremacists, followed by gun attacks against blacks, Jews, Muslims, or Latin American immigrants.
In some cases, the killers use their internet posts to praise previous attacks by other white nationalists. And after new assaults, the manifestos get passed around, feeding the cycle of propaganda and violence.
Following the racially-motivated attack that killed 22 people at a Walmart store in El Paso, Texas, President Donald Trump said he wants police to do more to stop extremists who are active...