In the society of Jesus’s time, physical illness was typically construed as a curse, and in many cases sickness or deformity prevented one from participating fully in the life of the community, especially in common worship. Curing the blind, the deaf, the lame, and the leprous, Jesus was Yahweh binding up the wounds of his people and restoring them to communion.
The ISIS barbarians were actually quite right in entitling their video “A Message Written in Blood.” Up and down the centuries, tyrants and their lackeys have thought that they could wipe out the followers of Jesus through acts of violence. But as Tertullian observed long ago, the blood of the martyrs is the seed of the Church. And they were furthermore right in sending their message to “the Nation of the Cross.” But they should know that the cross taunts them.