Miller himself gave the key last night: "I once was lost, but now am found". With God's help, people can change. Whatever he once was, Miller obviously is different now. He was pro-abort, now is prolife, etc.
But the non-theist Dems deny the power of God to change a person, thus cannot comprehend genuine changes, only changes in posture for political reasons. Thus, Bush is still a drunk, etc. They'll say anything to seize and hold power. But Judgment Day is coming.
With notable exceptions, mostly late last night, the music of this convention has been disappointing.