Many people justifies Giroud celebration because it's only a couple of seconds, but I think it's not about the time spent on that celebration, it's about the mentality, you can see Sanchez and Chamberlain getting furious with him, and that's not good for the team, a draw can tell a lot about a team condition, when a team have a draw and they celebrate, you know it's a hard match and they feel draw is a good result, but last night only Giroud and Gabriel celebrate after the goal, you can see the other tried to pull those two back to start the game as soon as possible, and that shows different mentality or mindset within the team, I would have understand if they faced Chelsea or Liverpool, but it's Bournemouth
If Barca/Bayern/Real/Chelsea went 3-0 down and have a comeback in injury time against mid-table team, you know every player in the team will not have a celebration like that, they all will just run back to their own half, trying to start the game as soon as possible, and that shows mental strength, the believe that the game is not over yet and a win is reachable, but you see Giroud and Gabriel doing that thing and you wonder what their teammates think about them now