There are many who don't believe Islam is the religion of peace but that doesn't stop him from saying it. It is Christmas. There is no other way to describe it even if you don't celebrate it. Christmas is no longer simply a religious holiday. Even atheists celebrate Christmas.
There were circumstances that facilitated him saying these words. Not because of a celebration, but to help Americans who had never been introduced to Islam to understand that not all Islamics are suicidal murderers, trying to keep innocents from zealots like you portray yourself from seeking out Isamics and killing them for revenge.
Try again.