Facebook CEO Mark Zuckerbeg is livid at employees who are resisting attempts to push the Black Lives Matter mantra at his California headquarters.

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A famous signature wall that has turned into a sounding-off board for Black Lives Matter advocates has repeatedly been altered to say "all lives matter." Zuckerberg scolded staff at the Menlo Park complex in a private memo obtained Gizmodo on Thursday.

"There have been several recent instances of people crossing out ‘black lives matter’ and writing ‘all lives matter’ on the walls at MPK,” Zuckerberg wrote. "Despite my clear communication at Q&A last week that this was unacceptable, and messages from several other leaders from across the company, this has happened again. I was already very disappointed by this disrespectful behavior before, but after my communication I now consider this malicious as well."

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Zuckerberg's employees have reason to question Black Lives Matter supporters' activism. They have consistently made national headlines that undermined its credibility.

Latausha Nedd, also know as Eye Empress Sekhmet, was arrested in Clayton County, Georgia, Sept. 24, 2015, after she allegedly declared “open season on crackas” in a YouTube video, WND reported.

Black Lives Matter supporters in St. Paul, Minnesota, were also caught on camera chanting, “Pigs in a blanket, fry ’em like bacon” on Aug. 31, 2015, CBS News reported.

New York City cop killer Ismaaiyl Brinsley posted, “I’m Putting Wings On Pigs Today. They Take 1 Of Ours … Let’s Take 2 of Theirs. #ShootThePolice,” on Instagram hours before killing NYPD officers Wenjian Liu and Rafael Ramos on Dec. 20, 2014. The 28-year-old committed suicide shortly afterward.

Supporters of the Black Lives Matter movement attacked Marine veteran Christopher Marquez in a Washington, D.C., McDonalds on Feb. 12. The war hero, who helped inspire the "No Man Left Behind" memorial at Camp Pendleton, California, was knocked unconscious and robbed after being harassed on race issues.

Facebook's CEO ignored the movement's marred reputation while admonishing his employees.

"'Black Lives Matter' doesn't mean other lives don’t – it's simply asking that the black community also achieve the justice they deserve," Zuckerberg said. "Regardless of the content or location, crossing out something means silencing speech, or that one person’s speech is more important than another's. Facebook should be a service and a community where everyone is treated with respect."

In "Scam: How the Black Leadership Exploits Black America," Rev. Jesse Lee Peterson shows how the civil rights establishment has made a career out of keeping racial strife alive in America.

"This has been a deeply hurtful and tiresome experience for the black community and really the entire Facebook community, and we are now investigating the current incidents," he continued.

Employees were then encouraged to attend a meeting on March 4 to "educate themselves" on the Black Lives Matter movement.

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