I propose that we call folks like this “Christianists.”
Tangent: Judas has always been my favorite apostle, and I hate how many people think he sucks. I mean, if they believe that Jesus HAD to die for the sins of mankind, yadda yadda, then Judas HAD to betray him. If anything, you should hate on God, who planned the whole thing and set Judas up as the villain/scapegoat.