Does that blog have the primary source documents they refer to in their post? If so, it adds credibility to their story. If not, it subtracts credibility from their story.
"The April 27, 1967 issue of the New Orleans States-Item featured a story written jointly by the States-Item and the Dayton (Ohio) Daily News that points to CIA undercover agent Gordon Novel as having played a part in the CIA's false flag "Fair Play for Cuba" operations in New Orleans that also employed Oswald and, as WMR previously reported, Rafael Cruz. While flying the "pro-Fidel Castro" flag, Fair Play for Cuba, which was headquartered in the same building and office space that also housed former FBI agent and JFK assassination co-conspirator Guy Banister, was a front for anti-Castro activities in the New Orleans area beginning as early as 1961."