I do not think Foxman changed his mind. I also believe that the mosque should not be built near ground zero. They have a right to build there, but it is not the right thing to do.
I find this entirely consistent with my life-long opposition to bigotry. Just because a bigot wants the same thing that I want, does not make me a bigot. I do not want to hurt people, drive them out of the country or damage their property.
Ground Zero is a very special place. I think it would be much better if the Mosque/Community Center was built in another, nice, part of Manhattan.