I’ve been in ministry for 14 years, 6 as a Military chaplain. I don’t think Christians are spending a whole lot of time worrying about these things. I think most think of Catholics and Protestants as just different flavors of Christianity.
I am from a Catholic family. I have a brother and sister who changed and became “Born Again Christians” They told my parents because they were Catholics they were not saved and they were going to Hell. My Parents never missed going to mass every Sunday and made all my siblings attend church. It was something that hurt my parents till they passed away. I am certain there are Freepers on this forum who believe the same.