There was a different mood for protesters on Saturday after the deaths of five Dallas police officers at a Black Lives Matter rally. And then when we grow older we are animals to be afraid of, people you need to stay away from.
The protesters were demonstrating against police brutality in the wake of officer-involved shootings of black men earlier in the week in Louisiana and Minnesota and the mass shooting at a march in Dallas that left five law enforcement officers dead.
Johnson wanted to "kill white people, especially white officers", Dallas Police Chief David Brown said after the attack on Thursday night.
Some whites have indeed taken steps to build support for the Black Lives Matter movement among their fellow whites, and they say they are making progress.
"If you see someone being shot while sitting in a vehicle with his family, and you don't have some empathy, you've got some work to do", he said in reference to Castile's death.
The flames were fanned further Saturday night when prominent BLM activist DeRay McKesson was arrested by police at a protest in Baton Rouge, prompting thousands of outraged tweets with the hashtag #FreeDeRay. "We need you right now like we have never needed you before".
In a statement late last week, the official Black Lives Matter organization that Garza and Cullors founded, which has 40 chapters and represents a portion of the movement, predicted that "there are some who would use these events to stifle a movement for change and quicken the demise of a vibrant discourse on the human rights of Black Americans".
"There's too much violence in the black community", he said.
The head of a lobbying group that represents USA police unions and associations on Friday said Obama's administration helped create the climate that led to the Dallas shootings by being too slow to condemn anti-police sentiments. Police say a Molotov cocktail was thrown at officers. They are analyzing information in the journal, police said in a statement.
Black Lives Matter is a diffuse movement that started with a hashtag on social media three years ago this week.
"He let the officer know that he had a firearm and he was reaching for his wallet and the officer just shot him in his arm", she said as she broadcast details of the Wednesday shooting on Facebook.
"I think people forget that racism is a worldwide thing".
Demonstrators march through downtown Atlanta to protest the shootings of two black men by police officers, Friday, July 8, 2016. "Can we address the inequalities and disparities that President Obama called to our attention, or will we ignore them at our own peril?" "You do not know that after we get angry with you, we get even angrier with ourselves, because we don't know how to make you stop, or how to make you care enough to stop those who pull the triggers". But until that serious discussion happens, he said he fears "we're going to continue to see this kind of tragic incident" like the Dallas attack. "It's the police officers doing it".
Hundreds demonstrated for hours on both sides of the Bay, marching toward San Francisco City Hall to protest police violence against African-Americans.
Young black people today have higher expectations, which is a sign of progress, he said.
"We Want Freedom." He said he worries that the actions of a deranged individual will overshadow progress the Black Lives Matter movement has made. "We are fed up", said Erica Mines of the Philly Coalition for REAL Justice.