Yes, the KKK is still around and they march in parades.Is the KKK still around?
I'd say if they did, it'd depend on circumstances of the community where they want to build.
No, no-one has absolute rights in that area, just like free speech...
there's certain restrictions there too.
http://vodpod.com/watch/4261769-ground-zero-mosque-imams-controversial-60-minutes-interview
I'm not going to put a link here to their site. I have no intention of promoting them by giving their site another hit.
Regarding the Muslim community center....
The point remains that if the local government can deny or prevent one religion from opening a center then it opens a can of worms to prevent Christians (or any other religion) from opening community centers. Spike's example of the YMCA and YWCA (Young Men's Christian Association and Young Women's Christian Association) community centers is perfect. They were allowed to open though they were intended to be a Christian based community center.
No one has really explained why a religious organization should not be allowed to open a community center. Because that's what it boils down to.