yes you are and i'm surprised they put that. they'd probably argue they are not asking you to be Christian, only to apply "Christian values", but its implied that only Christians should apply.
yes, thats the inference. religion is essentially a set of philosophical points. its a failing of our education that we learn of half a dozen religions, leaders and practices, yet nothing about Plato, Confucius, Descartes, Smith, Marx, Russell or Sartre.