This legislation would require any religious zealots invading our country to provide their info to the government, and would require that the government publish their info in a public database.
Additionally, all registrants would be required to wear a small patch, directly over their heart to show the rest of us REAL Americans where their allegiances lie. Any registrant that attempts to avoid registration/identification would be deported to their country of origin or dumped on a remote island if that country refused to accept them.
The criteria for registration is simple; if a person is a terrorist: they must register. Terrorists are the scum of humanity that try to destroy entire civilizations by implementing religious law and taking the rights of good God-fearing people, like Muslims.