Marcionism is an ancient heresy which asserted that God as revealed in the New and Old Testament are two distinct beings, with the latter being much inferior.
It rejected Old Testament Scripture.
Karl Giberson, vice-president of the Biologos Forum, in an essay: “Exposing the Straw Men of New Atheism: Part Five”.
To provide context Giberson points out that both science and religion have advanced in their understanding and practice through the ages and it is wrong to claim that religion alone rejects progress.
Theology and biblical studies move forward as well in dramatic and revolutionary ways but New Atheist critics dismiss this progress because it is not acknowledged by lay people on Main Street or in intellectual backwaters like those where Al Mohler and Ken Ham paddle about. This is a gigantic blind spot for people like Richard Dawkins, on par with failing to acknowledge that electricity has changed the world in some important ways just because there are some villages in Tibet go without it.
The point is reasonable made, but then Giberson decides to dispose of baby along with bath-water:
In The God Delusion Dawkins eloquently skewers the tyrannical anthropomorphic deity of the Old Testament—the God that supposedly commanded the Jews to go on genocidal rampages and who occasionally went on his own rampages, flooding the planet or raining fire and brimstone on wicked cities. But who believes in this deity any more, besides those same fundamentalists who think the earth is 10,000 years old? Modern theology has moved past this view of God.
Don’t worry about the New Testament though, because:
Christianity is rooted in unique historical events that were recorded by the early church as they tried to make sense of their encounters with the risen Christ. This was a unique and mysterious event that will never be “understood” within the explanatory framework of science.
The irony here is that it is true that the New Testament Christians did not turn to science or philosophy to make sense of their encounters with the risen Christ. The only witness that could allow them to make sense of their encounters with the risen Christ were the Scriptures of the Old Testament.
(As an aside, note how the essay is titled ‘Exposing the Straw Men of the New Atheism’ but the most condescending denigrations are directed towards Christians. Read it carefully, if you’re a Christian who doesn’t understand things about origins the way Biologos does you’re on a spiritual par with the folk who are doing without electricity in Tibet. Or living in a back-water. Poor you.)
Surely theistic evolutionists can do better than to run with this crowd.
HT: Al Mohler.
mgpcpastor's blog 
Yeah, BioLogos managed to pique my curiosity as a pretty necessary corrective to the angry creation scientists who push for the same exclusivity of position. It’s sad when in order to be a corrective against another wrong idea you feel the need to take the opposite extreme.
There were some nice articles on BioLogos to begin with, like Keller’s helpful pastoral approach to the question of Genesis. But now… it’s almost unreadable thanks to vehement ad hominem attacks against fellow believers.
A couple of things disturb me.
Angry creaton scientists don’t trash creation evolutionists when going after atheists. They go after atheists. (Which does usually involve going after evolution.)
When they want to go after Christian evolutionists, they go after Christian evolutionists.
I think.
The second is the problem that comes with a ‘forum’.
Clearly not everyone associated with the forum believes everything that everyone else on the forum asserts.
But stuff like this (to my mind) articulates a hermeneutic that goes far beyond anything demanded by Genesis issues.
A hermenuetic more associated with understanding the Bible as a human document that records the development of human understanding of God, not as God’s wholistic revelation of His redemptive purpose for His people.
Post like this suggest that the forum is being used to promote that hermeneutic, and as a vehicle for its promotion among evangelicals.