NEW YORK — When it comes to Kyrie Irving and Boston fans, there’s a whole lotta gray area. That’s not a particularly strong way to start a column or hook you into an opinion, but, as with most things involving Kyrie, abstruseness rules the conversation. Here was my initial reaction to Irving flipping birds and cussing: Kyrie Irving is right. He should be allowed to extend his middle finger. He shouldn’t be lampooned and fined a maximum $50,000 for the behind-your-head double-bird disguised as a head-scratch, a maneuver we learned in middle school as a stealth response to those whispers from be…
