Case in point...a few weeks ago Mark Steyn spoke at a Synagogue near me that I attended.The audience seems to be mainly members of the Congregation (lots of yulmakers ? spelling).The Rabbi spoke for about 10 minuted before Steyn came to the podium and he was outstanding.He talked about religion,politics,society...and was right on the mark with everything he said.
And I grew up in a Jewish neighborhood (a liberal one to be sure,in a town once represented by Barney Fa...no,can't say that...Barney Frank).
All males must wear a yarmulke in a synagogue (Jewish or not).