As Steve Kerr contemplates his future and whether the Warriors will be a part of it, the team’s fan base continues to debate his worthiness. This is normal, the complementary sideshow that accompanies any lame-duck coach regardless of achievement.While most seem supportive of Kerr heeding the voices of Stephen Curry and Draymond Green and re-signing for at least two more years, the more restless members of Dub Nation have champagne on ice anticipating their farewell celebration.Group 2, at least from here, has the weaker case.Group 1 considers Kerr an excellent coach, even if there were times last season when excellence did not surface. Truth told, Golden State occasionally appeared clueless about such basic NBA principles as purposeful passing, executing a fast break and scouting-report comprehension.Kerr did some of his best work when the Warriors were most compromised by injury. His overall record is impressive in ways both overt and subtle. latent. More on that later.Group 2, which seems smaller in number but is particularly vocal in the disaffected chamber of social media, has decided Kerr – who presided over teams that reached the NBA Finals in each of his first...