Symmetry wrote:So anyway, if anyone cares to read the OP:
I guess my earlier response was not truly an answer.. here goes.
Symmetry wrote:Now personally, I wouldn't nail down Christians as a unified group. Even within the CC Christian community I've seen posters talk about "Catholics or Christians", where I would generally think of Catholics as Christians. Back in the 17th century, Protestants used to label Catholics as atheists, and to a certain extent vice-versa.
Now I think that atheists are a pretty diverse group. No set of dogma- however much the evolution threads play out, for example, not all atheists believe or care about evolution, and not all Christians are creationists. Even within evolutionary theory, there are diverse views, and I doubt many would consider themselves Darwinist as if he was the be all and end all of evolution.
 
Evolution is a theory based on evidence and fact that can be proven to anyone, if they are willing to investigate.  The difficulty is that most people don't have the time to investigate and the move to make "the masses" distrust science has born great fruit.  That people don't choose to take the time to investigate, though doesn't put it into the realm of faith.
Ironically, the origins of the Earth were never really a big part of the Judeo-Christian traditional debate.    That God made the Earth, etc is absolutely a fundament, but the timeline was largely considered unspecified.   
Symmetry wrote:So, do Christian posters portray Christian thought correctly, or are there some who misrepresent Christian positions on confession, infant baptism, the hierarchy of the church, contraception, and missionaries, for example.
There is vast disagreement on all of those points.  Whether the portrayal is "correct" or not depends on your viewpoint.
For example,  I was taught that  infant baptism only became truly prominent, essentially universal during the  middle ages, as a result of very high infant mortality.   However, a scholar I spoke with not so long ago stated that there is evidence of infant baptismal fonts (the basin) and baptisms from the first century of Christianity.   
When you get into icons and such, then you get into a lot of esoteric debate.   The Greek Orthodox church (as I understand it) is similar to Islam in not wanting to protray images the savior and sometimes even of any human.   On the other side, you have Roman Catholics who see real and true power in objects of faith in a way that many Protestants and evangelicals consider almost "magical", even somewhat pagan.   Each of these issues and many more have all been sources of great debate and division within the church. 
And, those are just the "recent" debates.   Some debates are even outlined within the Bible.
Symmetry wrote:Can any Christian honestly say that they portray Christianity correctly? Surely nobody's that perfect.
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Even beyond the "nobody's perfect" bit, the church has been many churches within one from the beginning.  The disciples themselves often argued vehemently about various points.  In my church, we have studied the "7 original churches"  mentioned in the  Bible. Each of them differed greatly.  So, from the start it has been almost impossible to talk of "one church" or "one faith". Yet... we are all to be united under Christ and a belief in him.