Bryce Williams/Vester Flanagan said the Charleston Church shooting in June spurred his homicidal rage ... which exploded this morning when he took the lives of a Virginia reporter and photographer.
ABC News in NYC says it received a 23-page fax from Williams this morning -- almost 2 hours after he had killed Alison Parker and Adam Ward. In the document ... he says he put a down payment on a gun on June 19, 2 days after the Charleston tragedy.
He wrote, "What sent me over the top was the church shooting. And my hollow point bullets have the victims' initials on them." He also addresses the Charleston shooter directly, writing ... "As for Dylann Roof? You want a race war (expletive)? BRING IT THEN YOU WHITE (expletive)!!!"
Williams also called out the Columbine and Virginia Tech shooters -- "Also, I was influenced by Seung-Hui Cho. That's my boy right there. He got NEARLY double the amount that Eric Harris and Dylan Klebold got...just sayin."
The document also includes a "Suicide Note for Friends and Family" ... where he says he suffered racial discrimination, sexual harassment, and was attacked for being a gay, black man.