There is something that never fails to amaze me. It's how little christians often know about their own religion. Not necessarly controversial stuff, but things that are known facts and which the church admits to.
You would think that as an atheist, I'd be less knowledgable about the bible and christian history. And many Christians attack me as "Well, how can you know? You're an Atheist!" or even "You don't believe because you're uneducated about the faith"
Examples:
I told someone Christ was not born on December 25th. That the day was just chosen. They said "Of course he was." I explained that the Church would admit that there is no known date and that the date was chosen for other reasons. I challanged them to find a date in the bible. FInally they said "it's just an artical of faith."
Faith??? Damnit! No it's not. It's not an actual belief. It's just the day chosen to....ug forget ti.
There are certainly some Christians who are woefully ignorant about their own religion (and other religions). Largely due to these forums, frankly, I'm exposed more to the ignorance of other nonbelievers than to the ignorance of Christians. I tend to agree with Stamenflicker that what you're talking about is symptomatic of general ignorance. I don't mean to exclude myself from this assessment - I know very little indeed of everything there is to be known about the Bible, Christian theology, etc.
Other examples:
The "Rapture" is not in the bible and was first mentioned in the middle ages... based on loose biblical interpertation.
Yes, I agree that many fundamentalists and evangelicals are not aware of, or refuse to accept, the fact that there is really no Biblical support for the doctrine of the rapture as they hold it. However, I am aware of no discussion of the rapture as such (specifically, a pre-tribulational event by that name) until the first part of the 19th century. No one in the Middle Ages would have heard of such a thing (although the fundies actually drew the name itself from a word that appears in the Latin Vulgate:
rapiemur, "we will be caught up").
"Pergatory" or "Limbo" the place you go when you die and have not been baptised or need to be obsolved from sin... well...it is not in the bible and the Catholic Church (which invented it) now has taken it back...
As some others have pointed out, that conflates the two distinct notions of Purgatory and Limbo. Purgatory, according to the old
Catholic Encyclopedia, is "a place or condition of temporal punishment for those who, departing this life in God's grace, are, not entirely free from venial faults, or have not fully paid the satisfaction due to their transgressions." Limbo (or more specifically the
limbus infantium) is a conjectural place or condition for those who die in a state of Original Sin but without any grievous personal sin; they have often been thought to be excluded both from the beatific vision and from the pains of Hell.
One important difference between these concepts is that Purgatory is part of Catholic doctrine and thus has very little prospect of ever being "taken back", whereas Limbo was never more than an unofficial speculation by certain theologians which has at no time (to my knowledge) been formally articulated as a doctrine of the Catholic Church. Therefore, although it's true that the Church has made recent moves to review and revise theological theories on the topic, there really is nothing for the Church to "take back" in that regard.
I would add that, if one takes the premises of the Bible as true, it is not difficult to infer the existence of Purgatory therefrom. To that extent, although Purgatory is not mentioned in the Bible as such, it is, arguably, strongly implied by what is in the Bible.