Here are reasons to extend Jackson . . .
He won 51 games and brought his team to the playoffs the second season in a row. Because of him the Warriors, who had been a joke, are a serious team in the NBA. He changed their culture from passive losers to aggressive winners. He gets big credit for the culture shift.
The Warriors played the third-seed Clippers in the first round of the playoffs and played them tough without center Andrew Bogut. Game 7 came down to the very end and the Warriors almost won.
Jackson made a brilliant strategic adjustment against the Clippers, benching center Jermaine O'Neal, moving David Lee to center and taking Draymond Green off the bench and moving him to power forward. The Warriors' "small" lineup was their best lineup. Green was the most feisty Warrior and made life miserable for Clippers' All-Star power forward Blake Griffin, often took Griffin out of his game and turned Griffin into an on-court whiner.
Most of his players love Jackson and want to play for him. We haven't seen the Warriors play this hard in a generation. Stephen Curry routinely campaigns for a Jackson extension, and Curry is the most important Warrior by a million miles.