Mushrikoon Believed in Allah as their Rabb
All religions for the most part at least believe in one Supreme being, whether it be “God the Father” or Zeus in Greek mythology. The mushrikoon believed in Allah as a Rabb. This therefore necessitates that Ruboobiyyah alone is not sufficient. Abu Lahab and all of the leaders of Quraysh believed in Allah as a Rabb. Even Iblees believed in Allah as a Rabb.
“[Iblis (Satan)] said: “See? This one whom You have honoured above me, if You give me respite (keep me alive) to the Day of Resurrection, I will surely seize and mislead his offspring (by sending them astray) all but a few!” (17:62)
There are many clear ayaat proving that the Jahiliyyah Arabs believed that Allah created and sustained everything, and was All-Powerful.
“If you ask them, “Who created the heavens and the earth, and put the sun and the moon in your service?”; they will say, “Allah.” Why then did they deviate? Allah is the One who increases the provision for whomever He chooses from among His creatures, and withholds it. Allah is fully aware of all things. And if you ask them Who is it that sends down water from the clouds, then gives life to the earth with it after its death, they will certainly say, Allah. Say: All praise is due to Allah; but most of them do not understand.” (Al-‘Ankaboot, 29:61-63)
“If you asked them who created them, they would say, “Allah.” Why then did they deviate?” (Az-Zukhruf, 43:87)
“Say, ‘To whom belongs the earth and everyone on it, if you know?’ They will say, ‘To Allah.’ Say, ‘Why then do you not take heed?’ Say, ‘Who is the Lord of the seven heavens; the Lord of the great dominion?’ They will say, ‘Allah.’ Say, ‘Why then do you not turn righteous?’ Say, ‘In whose hand is all sovereignty over all things, and He is the only one who can provide help, but needs no help, if you know?’ They will say, ‘Allah.’ Say, ‘Where did you go wrong?’” (Al-Mu’minoon, 84-89)
They have been deluded and misguided even though they accepted Allah as a Rabb.
This shows that the Jahiliyyah Arabs believed in Allah yet committed shirk.