On Facebook, Mr. Green had posted speeches and articles written by Mr. Farrakhan and Elijah Muhammad, who led the Nation of Islam from 1934 to 1975, that discussed the decline of America. Two law enforcement officials confirmed that the Facebook page, which was taken down on Friday, had belonged to Mr. Green.

Mr. Green posted on Facebook about his personal struggles, especially during the pandemic.

“To be honest, these past few years have been tough, and these past few months have been tougher,” he wrote. “I have been tried with some of the biggest, unimaginable tests in my life. I am currently now unemployed, after I left my job, partly due to afflictions.”

He also spoke on Facebook about the “end times” and the anti-Christ.