Excuse me, they were not doing anything any other citizen could not have done. They didn’t do anything a reporter for the Newark Star Ledger or the Rutgers student newspaper could not have done, had they been interested. There is no indication of any illegal activity or exercising police powers in New Jersey, they were just “looking around”. You or I can masquerade as Muslims and join the local mosque to keep tabs on trouble makers, just like the FBI infiltrated the Bund prior to World War II.
I don’t think they are on vacation in NJ acting as any other citizen. There is a difference.