Please Help, Could someone Revise this Sentence Fragment for me?

1 In an interesting magazine article about vandalism against works of art. 2 The focus was on the vandals themselves. 3 The motives of the vandals varying widely. 4 Those who harm artwork are usually angry. 5 But not necessarily at the artist or the owner. 6 For instance, a man who hammered at Michelangelo’s Piet‡. 7 And knocked off the Virgin Mary’s nose. 8 Because he was angry with the Roman Catholic Church. 9 Which knew nothing of his grievance. 10 Although many damaged works can be repaired. 11 Usually even the most skillful repairs are forever visible.