I think that the Muslims have every right to build a mosque where ever they chose to do so. This right is protected in the constitution...they have freedom of religion and freedom to build a place of worship. However, they should realize that by doing so on ground 0 they are creating a great deal of controversy. People will be upset and I can guarantee that someone or a group of people will try to destroy it. They are asking for trouble. They may be just trying to make a statement, but this statement will cause more animosity towards them. I would give the consequences to this decision a little more thought before going ahead with it.