DRESSED IN A BLACK Pittsburgh Steelers shirt, the woman sniffed back tears as she made her way through the still-crowded memorial outside the Tree of Life synagogue in Squirrel Hill, gently, unconsciously rolling a small stone in her right palm. I never intended to start this "week with the Steelers" diary with a visit to Squirrel Hill, but you realize quickly that, in this town, there's no way to separate the two: On this Monday morning, the two items above the fold in the Pittsburgh Post-Gazette are James Conner and the Squirrel Hill Massacre.