A House of Horrors no longer. Instead, it was a Bell Centre Beatdown. The Rangers came out on Saturday afternoon and opened the Eastern Conference finals by putting an absolute hammering on the Canadiens, taking a 7-2 win in Game 1 that quieted the 21,273 in the Bell Centre along with all of the Blueshirts’ disastrous history in this building. That includes goalie Henrik Lundqvist, who got his first win in this arena since 2009, turning back the quick and skilled Canadiens — who looked anything but — in the few times they found a way to rise from their malaise and mount an attack. The Rangers as a team have not looked better this whole season, not during the 82-game schedule in which they finished second in the Metropolitan division, nor in beating the Flyers and Penguins in the first and second rounds, respectively, both in seven games.