Joe Lacob is making monumental mistake with Jonathan Kuminga

Golden State Warriors, Joe Lacob | Kelley L Cox-Imagn ImagesJonathan Kuminga's future with the Golden State Warriors is still in the balance. He turned down a two-year, $45 million offer with a team option in the second season and without a no-trade clause. Teams have inquired about Kuminga, like the Kings and Suns, but a sign-and-trade is apparently off the table now.

Kuminga doesn't feel valued by Golden State, which is valid, considering he was in and out of the rotation. The Warriors value Kuminga more in trade talks than they do as a player. It's understandable why Golden State doesn't want to give the forward a long leash to develop because they're in win-now mode, but it doesn't make…