“The blog ruminations of the director of mensaction.net, who was a former military officer himself, was particularly Ripperian. ‘The phallic symbol of America had been cut off,’ he wrote of the World Trade Center, ‘and at its base was a large smoldering vagina, the true symbol of American culture, for it is the western culture that represents the feminine materialistic principle, and it is at its extreme in America.’”
— Susan Faludi, The Terror Dream (2007)
This was not the only site to say this after 9/11, and I can only assume that’s why the towers are depicted this way here.