God created the potential for that attitude. Satan chose that attitude.
Satan was a newbie. God told him the truth and he doubted.
Adam and Eve were in a similar situation -but Satan deceived himself.
Satan did not demand equal rights, he turned a third of the angels against God and attempted a coup.
He did not have what it took to replace God -even if he would have been successful.
Fortunately, Satan does not now have ultimate control.
He is not equal with God, so should not have "equal rights".
God knows good and evil -but knowing and doing are very different.
He has, at times, purposed evil -but that is also different.
He has purposed that we experience the results of sin/acting contrary to the law of love -but for our eventual benefit -as we are initially ignorant and inexperienced.
The history of the world since Adam (and the angels under Satan before) is the expression of that attitude. God did not want it expressed -but knew it would be expressed -even needed to be expressed to eventually eradicate it -because it is falsehood based on ignorance and inexperience.
Satan's attempt at taking God's throne was put down, and he and the sinning angels were restrained -doing only as God allows.
God purposefully allowed Satan and the sinning angels to interact with Eve, etc., and even to affect the course of the affairs of human nations.
Why? So that those angels and men alike will learn the end that attitude produces.
So... God allows all the "right" to express that attitude, so they can realize it's not such a great idea.
This is what God will do to Satan...... But also consider what Satan desires to do.....
God has been very patient, considering -and will prove his point in no uncertain terms.
In the beginning of the following chapter, a "prince of Tyrus" is mentioned, which is a ruler Satan (called king of Tyrus) will soon use to essentially start WWIII -which will lead to a decimation of the earth's population. He will also move them and other human forces to fight Christ when he returns. Those forces will be destroyed (later resurrected), and Satan will be imprisoned for a time.
God does know what will be -allows us to play out our attitudes -and waits until we have learned our lessons.
16By the multitude of thy merchandise they have filled the midst of thee with violence, and thou hast sinned: therefore I will cast thee as profane out of the mountain of God: and I will destroy thee, O covering cherub, from the midst of the stones of fire.
17Thine heart was lifted up because of thy beauty, thou hast corrupted thy wisdom by reason of thy brightness: I will cast thee to the ground, I will lay thee before kings, that they may behold thee.
18Thou hast defiled thy sanctuaries by the multitude of thine iniquities, by the iniquity of thy traffick; therefore will I bring forth a fire from the midst of thee, it shall devour thee, and I will bring thee to ashes upon the earth in the sight of all them that behold thee.
19All they that know thee among the people shall be astonished at thee: thou shalt be a terror, and never
shalt thou
be any more.