Why are the families of the 7/7 Bombers still living in Leeds and other UK cities?

To my mind, their right to a place in society was surrendered when their relatives committed that vile evil attrocity. Every relation of these evil beings should have been returned to their home country. This hasn't happened however, they (such as Sidique-Khan's wife) live among us in areas such as Beeston in Leeds and live off the state too. This country has gone mad.