Should Christians pray with Jews who refuse to acknowledge that Jesus Christ is God?

No!  Christians must refuse to pray with their Jewish friends, neighbors, and co-workers who refuse to acknowledge that Jesus Christ is God.

These Jews who refuse to deny Jesus Christ’s true identity do not respect Jesus Christ.  Prayers is talking to God, who is Jesus Christ.  Thus, you must not pray with your Jewish friends, neighbors, co-workers who fundamentally disrespect the true identity of Jesus Christ.