except the links you provide list secular and non-secular activities in about equal proportion (using 20th century as the data set).
December 30, 1903: The Iroquois Theatre Fire in Chicago
December 24, 1913: 73 people were crushed to death in the Italian Hall Disaster in Calumet, Michigan. This event is considered the legal source for the often-cited First Amendment limitation of "falsely shouting fire in a crowded theater.
October 23, 1942: attack by RAF Bomber Command on Genoa
January 13, 1991: 40 people killed at a football match in Orkney, South Africa.
August 20, 1988: 2 people were crushed to death during a Guns N' Roses concert
June 27, 1992: More than 500 people were injured in Munich, Germany when the crowd at pop singer Michael Jackson's debut Dangerous concert became overwhelmed and began rushing at the barriers
October 16, 1996: 82 killed, 147 injured on a steep stadium stairway prior to a World Cup qualifying match between Guatemala and Costa Rica