As previously reported, Killorn chose to return the Stanley Cup to Montreal to share it with his family. His excursion to downtown Montreal with the trophy appears to have sparked the ire of the Canadiens supporters.
As you can see in the image below, Killorn is happily lifting the Stanley Cup high above his head, with a placard that just reads "Centre Bell" just above it. It's the Bell Center, home of the Montreal Canadiens, and it's one of the greatest attempts at trolling we've seen this summer.