"Of course, there are "mainstream churches" which don't believe in Christ, in sin, in the resurrection, or in the Bible, so that example isn't very compelling.
"
All of the churches I mentioned earlier have adopted the Nicene Creed, which includes all your points. Name me one "mainstream" church which does not believe in all of those, please.
Waiting for the science nazis to show up and tell us all we're pinheads for not buying into their myth.
Maybe he's thinking about Unitarians. They're kinda' mainstream in parts of Minnesota. Or at least mainbrook. Ok, maybe maintrickle.