This has been in motion since January. Al Davis always wanted to fire him, why wait until the season has already started to do it? Who cares if he didn't want to pay Kiffin, just fire him and get it over with.
With that said, Kiffin should never have been fired. Way to early to know if he would have became a good head coach or not.
People always say Miami is being laughed at, or being called a "mess", however Oakland has to be the worst ran franchise not only in the NFL but in all of sports. They will never win anything or get a good head coach until Davis is gone.