I think Beck made two strategic blunders with Saturday's event.
First, in terms of ole time country, Gospel revivalist, come back to Jesus, Bible-thumping, Christian Evangelical speeches Beck's was a pale imitation. He has neither the charisma nor the talent those traveling preachers of long American tradition have. You might disagree with that particular form of religion but you must give credit where credit is due, their adherents always come away entertained and thoroughly inspired. Beck packed in all the self improvement clichés imaginable but none of the holy spirit; it was one long, drawn out lecture that left the crowd in a stupor.
Second, the location shrunk Beck down to a spec. Two of the greatest American speech makers, Martin Luther King, Jr. and Abraham Lincoln, giants in our history, made Beck the present day dwarf. I don't think his very best speech on his very best day could possibly be in the vicinity of the occasions in which we remember MLK or Honest Abe. To be fair, who could? And by standing on the steps of the Lincoln Memorial where King gave his most famous speech, no matter what Beck did, he invited those comparisons, much to his disadvantage. It was a distraction from his purpose; an extra burden that overwhelmed what measure of talent and sincerity he does possess.