It'd be realistically punishing if I said they can't practice their religion, period. I've never said such however
We have 2 scenarios that realistically will unfold.
1) The Imam, in his supposed quest for bringing peace and an education of Islamic tolerance to the U.S. people, can acknowledge how this can be seen as insensitive to many, given the events of 911, to want to build an Islamic Mosque in such proximity to a site where thousands were murdered in the name of Islam, and announce a compromise by moving the site a little further away. Everyone can eat, sleep, and pray, to their heart's content
2) The Imam, can legally and constitutionally build his Mosque right where he wants to, and basically say "go pound sand" to the vast majority of the U.S., pissing them off, and accomplishing precisely the opposite of what his supposed intentions are. Not to mention the vast amount of resources he'd have to apply towards security, as the radical nutballs line up to see how quickly they can "bring it down"
Since this has never been an issue of they can't build it there, and far more so that they shouldn't build it there, I wonder which he'll choose