Well, John Sailhamer, in The Meaning of the Pentateuch, argues that your church probably swallowed many of Schleiermacher's assumptions a long time ago and never even knew it:
Under the influence of Schleiermacher, evangelicals, in practice if not in theory, edged increasingly closer to the notion that the OT did not belong to the church but was more nearly associated with the religion of ancient Judaism. Such a view was considerably at odds with the classical orthodox view of the OT. (p. 133)Sailhamer says far more on this topic than I could begin to distill here. I do think it's important for dispensationalists in particular to weigh Sailhamer's exhortation, not dismiss it on the grounds that "we're not really evangelicals."
Piper was right. This book will rock your world.