Marty,
I contacted AOPA and they claim no knowledge of issues at Cal City Airport regarding gliders. Here is their reply to me.

Hi Guy,

Thanks for contacting AOPA's Pilot Information Center. I am not aware of any AOPA movement to drive off any operations at L71. AOPA represents all pilots, including glider pilots. Is there a situation at California City Municipal that we should be aware of? Please do not hesitate to contact us if you have any other concerns or questions.

Safe Flying,

Paul Feldmeyer | Pilot Information Center
Aircraft Owners and Pilots Association
800-872-2672 | www.aopa.org

So, Marty...can you explain this?