The Ground Zero mosque that used to exist

Business Insider:

It turns out there was a Muslim prayer room on the 17th floor of the south tower of the World Trade Center, where Americans and other traveling Muslims prayed every day.

On September 11th, 2001, when a handful of terrorists flew planes into the towers, some of the folks who used the room evacuated in time. Others probably didn't.

In other words, there already was a "ground zero mosque"--used by Muslim Americans who were murdered just like everyone else.