回复：天主教是基督教的本支。新教不能独霸基督教的名称

Yes, Chritian is the original abd Catholic and protestant are two branches: . But in US, when you say the work Christian, that most of time means Protestant. EG, if you say xx Chritian School, it is just a Christian school ( protestant). If not, they always use XX Catholic School as the school's name.