The second Sunday after the Sept. 11 terrorist attacks, New York clergy members of many faiths joined elected officials at Yankee Stadium in a city-sponsored memorial ceremony that melded the sacred and the secular, replete with flags, prayers and tears.

Ten years later, any consensus that existed about the appropriate role of religion in public ceremonies marking a monumental American trauma has fallen apart.

Mayor Michael R. Bloomberg has come under attack by some religious and political leaders for not including clergy members as speakers at Sunday’s official ceremony at ground zero on the 10th anniversary of the attacks.

Richard D. Land, president of the Ethics and Religious Liberty Commission, which is the public policy arm of the Southern Baptist Convention, said in an interview that the planned ceremony only proved that New York was the “epicenter of secularism,” out of step with the rest of America.