Here's a thought. If I were forced to choose between orthodoxy and orthopraxy, I think I might choose on this basis:
I would rather act like Jesus and know nothing of Him, than know of Jesus and act nothing like Him.
I'm not going to delve too deeply into this right now. But I wonder what God would prefer? Is what we know about Jesus more important to God than how we live our lives? There are a milieu of Bible verses going through my head right now. I suppose it sort of comes down to what one believes about the afterlife. If you believe the goal of life is to go to heaven when you die, then maybe knowing Jesus but acting terribly is ok, because you are forgiven and saved and going to heaven and no one is perfect anyway? But if you believe the goal of life is to participate in growing God's kingdom on earth, awaiting Christ's return when we will all be perfected, then maybe how you act today matters a bit more?
I know, I know. "They're BOTH important" you will say. OK. Agreed. But which is MORE important?