JOHN 13:1-17
1- If you break the bread, and drink the cup... do you also wash feet? To partake in communion and not live out the sacrifice of a life of servanthood for your brothers, sisters, and neighbors is to miss the message of our Messiah. The sacrament is a reminder of sacrifice, invitation to sacrifice, and a promise of blessing that can only be found through sacrifice. We wash, as He washed.
2- Jesus knew what Judas was to do, and washed his feet anyway. The people you think have no right to be washed, actually have every right to be washed... and if that doesn't fit inside your theology, your theology is incorrect. Sacrifice plays no favorites.