I didn't see where you pointed out my observations prior to my quoted post.
I don't know that his work drives people from the faith. Ehrman was a Christian, now turned to Agnostic.
He's a scholar and professor of NT studies and invests in the field of textual criticism.
Teaching the history of how the canon came to exist shouldn't turn people from wanting to learn about Christ.
And we know no one can take us from Christ.