Mamet famously converted to conservatism a few years back.
http://www.villagevoice.com/news/david-mamet-why-i-am-no-longer-a-brain-dead-liberal-6429407
as far as i know he is still a follower of Los Angeles rabbi, Mordecai Finley, at Ohr haTorah, a very spiritual Jewish congregation.
http://www.jbooks.com/interviews/index/IP_Finley_Mamet.htm
a very interesting fellow, indeed
Thanks for the links and info. Very interesting.