That, and the play of Stars netminder Ben Bishop, according to Carey Price.
"Bishop played a pretty good game. I thought he did a great job of stopping our chances," mentioned Price, referencing Bishop's 21-save effort. "Their best penalty killer was their best penalty killer tonight."
Discipline matters
It goes without saying that being assessed seven minor penalties didn't do the Habs any favors on Tuesday night.
At times, they let their emotions - and a measure of frustration - get the best of them, which resulted in a lack of discipline.
That simply can't happen, according to Gallagher.
"You're going to deal with little bits of adversity throughout the year. You can't let yourself get frustrated. You get frustrated, it's just a wasted emotion," indicated the Canadiens' assistant captain. "You waste way too much energy, you waste way too much thought on stuff that's out of your control. We've got to do a better job of keeping our cool, for sure."