Is it possible his real name was the jewish Karlinsky? https://duckduckgo.com/?q=karlinsky+jewish+name&ia=web
https://www.youtube.com/watch?v=z8WE23x3CCQ
Can also be found here on Bitchute: https://www.bitchute.com/video/zlAkE8GiJB0p/
Makes sense to me, always thought he looked like 2 jewish guy I knew in Switzerland
At 18:00 in this video, it is claimed that George Carlin was in a mobbed-up club in Ft. Worth - very near to Dallas - doing a JFK impersonation for drunken Secret Service agents who were supposed to protect JFK.
https://www.youtube.com/watch?v=rmZck_BPRC4&t=1080s