Whatever words Mulims may use to explain this mosque, the fact is that Muslims use mosques to take over other people's "holy" sites. Look at the Temple Mount in Jerusalem and the Haija Sophia in Istanbul. The first was the site of the Temple of Solomon; the second was the largest domed church in Christendom, in the city then called Constantinople.
Muslims have done this in every part of the world they conquered - take over the local holy site by building a mosque on it. Then it can't be taken back - because it's a Muslim mosque and holy to Allah.
This mosque at Ground Zero is an attempt to take over America's 9/11 site. At this mosque, Muslims will celebrate the success of the 19 "martyrs".
I hope to heck that’s an extraneous “not” in your first line.