These vegans have been protesting for months outside of this Canadian restaurant, Antler Kitchen & Bar that serves local, free range game. The protests had been costing him business so he had enough of it and boldly decided to butcher the deer right at the window.
The protesters might actually missing the mark because their signs focus on factory farmed animals and restaurant's whole focus is on using only local, sustainable ingredients and game.
Also, the protesters actions may have backfired because reservations have increased since his daring stunt.