Oswald was fluent in Russian. He was stationed in Atsugi, Japan (cia's base of operations at the time). He monitored U2 spy planes. He frequented the Officer's Club. There were actually 2 Oswald's - while one was in Mexico City trying to get a visa to the Soviet Union, the other was handing out leaflets in N'awlins. The were two Marguerite Oswalds (check out Vince Palamara's work on that) - one fat; one skinny.
Oswald was raised by his "mother's" relatives, the Murrett family, who produced children who would later go on to work for the SEE EYE AY (YIPPEE-TI-YAY!)
While in custody in the Dallas County Jail, Oswald requested to make a phone call. The jail operator, a Mrs. Trion, was instructed that 2 men would come speak to her and she was to do what they said - 2 men in suits, whom she'd never seen before, told her to not ring the number, but tell Oswald that the party did not answer. The number he wanted to call was for a man named John Herd/Hurt, who did counter-intelligence work for the Army in WWII. (Check out Dr. Grover Procter's work on that.)
Earle Cabell, mayor of Dallas, was the brother of Deputy Director of Central Intelligence Charles P. Cabell; whom Kennedy fired over the Bay of Pigs debacle.
Won't even get into the School Book Depository owner and his connections to LBJ and Connally (check out Mark Groubert's work.)
Oswald was an intelligence operative. Who's is anybody's guess. He was also a patsy.
https://aarclibrary.org/the-jfk-case-the-twelve-that-built-the-oswald-legend-part-2-an-instant-visa-gets-the-marine-into-moscow/