I wouldn’t be surprised that it’s for all of his anti-Israel activism while disguised as a Christian priest.
Munib Younan was discussed in Israel with a certain Orthodox priest I met, who didn’t hold him in very high regard. Younan speaks fluent Finnish and uses it to propagandize gullible Finnish church leaders and regular folks who would never believe that a church leader would tell bald faced lies to them.
NOTE: Some of the recipents of the award were: 5. The World Muslim Congress (1987), 25. His Royal Highness Prince El Hassan bin Talal (2008)