When Beowulf damages his sword wounding the dragon and is burned by the dragon's fire, Wiglaf is the only man of Beowulf's band to overcome his fear of the dragon. He rebukes the other thanes and goes to Beowulf's aid crying words of encouragement. Wiglaf does not retreat, though his shield is consumed by fire.
Explanation: Also, it's not Wiglag it's Wiglaf haha XD.
Friar hopes that the marriage can bypass that hate between both sides of the family he believes that peace and love between the couple can help the other people of the family.