Christians read this passage in Malachi as a foretelling of the coming of Christ.
Consider the promises made about the messenger: The one you want is coming. But, who will be able to stand it? He will refine and purify the descendants of Levi (us, too?)
After the fire that refines and purifies, the offering of Judah and Jerusalem will be as pleasing as it once was. (How does this promise relate to our situation? Should we translate the refinement as something that happens after death? Or, should we go ahead and repent immediately?)
Look at the specific wrongdoings mentioned: sorcery, adultery, swearing falsely, paying low wages, and deporting aliens.
Not tithing is robbing God. Do we agree? Do we act out agreement?