En bref
Jesus does not dispute whether Satan can indeed offer the kingdoms of the world (Matthew 4:10), because the Gentiles did indeed serve the devil, but God yet demanded their exclusive worship.
In his reply to the devil (Matthew 4:10) Jesus does not deny that the devil has a certain degree of power in this world. Therefore Jesus does not reject the offer as laughable and presumptuous. It may be granted that all Gentile nations of the world had been smothered in the service of the devil, but the Lord God demands that everyone without distinction worships and serves him alone.1
10 Jésus lui dit: Retire-toi, Satan! Car il est écrit: Tu adoreras le Seigneur, ton Dieu, et tu le serviras lui seul.