In the verses that appeared earlier, there was a strong and positive view of Allah's Oneness. Now the present verse points out to the error made by those who associate others in the divinity of Allah and think that they are caretakers of their needs. Their attachment to them reaches the proportions of love that is due for Allah alone.
In direct contrast to this profile of the polytheists, there are the true believers who love Allah alone, and very staunchly too, for a poly-theist may turn away from his self-made god in the event of an impending loss, but a true believer reposes his total confidence in Allah, in gain and loss alike, retaining His love and pleasure as his lasting possession, never leaving his Creator whatever the odds against him be.
Now, returning back to the 'unjust', the Holy Qur'an makes a subtle suggestion that the opportunity to correct their position was there; they could have recognized through their frustrations with their gods that they were helpless and that real power rested with Allah. But, they missed the opportunity and must now learn the hard way. So, the stern warning.