EX-NFL quarterback Colin Kaepernick has called the Fourth of July as a "celebration of white supremacy" in a Twitter rant.
The former footballer also shared a video that showed footage of the Klu Klux Klan, slaves, lynchings and police brutality.
The tweet read: "Black ppl have been dehumanized, brutalized, criminalized + terrorized by America for centuries, & are expected to join your commemoration of “independence”, while you enslaved our ancestors.
"We reject your celebration of white supremacy & look forward to liberation for all."
Kaepernick infamously sat or kneeled during the national anthem in the 2016/17 football season to highlight racial injustice in the US.
"I am not going to stand up to show pride in a flag for a country that oppresses black people and people of color," he told NFL Media at the time.
"To me, this is bigger than football and it would be selfish on my part to look the other way. There are bodies in the street and people getting paid leave and getting away with murder."
His high-profile stance caused a backlash with many threatening to burn Nike clothing and trainers after the sports giant signed him up for an anniversary campaign.
However, last month NFL Commissioner Roger Goodell said that teams should sign Kaepernick.
The football mogul said in an interview with ESPN that he is encouraging teams to sign the 32-year-old.
"If he wants to resume his career in the NFL, then obviously it’s gonna take a team to make that decision. I welcome that, support a club making that decision and encourage them to do that," Goodell said.
In an announcement weeks earlier, Goodell also said that the NFL was wrong for not listening to protesting players.
"We, the National Football League, condemn racism and the systematic oppression of black people," said Goodell.
"We, the National Football League, admit we were wrong for not listening to NFL players earlier and encourage all to speak out and peacefully protest.
"We, the National Football League, believe black lives matter. I personally protest with you and want to be part of the much needed change in this country."
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He continued: "Without black players, there would be no National Football League.
"And the protests around the country are emblematic of the centuries of silence, inequality and oppression of black players, coaches, fans and staff.
"We are listening. I am listening, and I will be reaching out to players who have raised their voices and others on how we can improve and go forward for a better and more united NFL family."