The spurious “war on Christmas” bemoaned on Fox News notwithstanding, a war really has been going on in recent years at the holidays: a war between traditional television Christmas specials and that aggressive musical interloper, the singing-competition finale. It’s a mismatch. With December now dominated by singing competitions — “The X Factor” and “The Voice” wrapped up last week; “The Sing-Off” ends Monday night — the old-fashioned variety-show-style Christmas special feels as if it […]