Analysis of the court decision striking down the ban is here.
Camp Lejeune policy banned the display of “extremist, indecent, sexist or racist†messages on cars. Mr. Nieto had been required to remove from his car an “Islam = Terrorism†decal, a “Disgrace My Countries [sic] Flag and I will SHIT On Your Quran†decal, a “decal depicting an Islamic crescent moon and star with a diagonal line superimposed upon them and the words ‘No Quarter’ and ‘Islamic Terrorist,’†and a “decal depicting Calvin urinating on Muhammad.â€