>> “The sixth seal is obviously judgment and wrath. Hardly, merely the iniquity of man.” <<
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Wrong.
The 6th seal is an aerial thermonuclear attack.
I do not claim to know whether it is global, or just affecting Jerusalem. But it is very much the actions of men.
You may want to return to Scripture and reread Rev 6:12-17.
While all the Seals, Trumps, and Bowl Judgments are Divinely ordained, their timing is only performed by Divine direction and by the 6th Seal and Bowl Judgments, even unbelievers and any believers remaining, will fully recognize the events are Divinely directed as His Wrath.
Even when unbelievers recognize the Divine cause of these events, they still will not repent of their thievery and will curse God, instead of turning to Him for Salvation.
We see today how even amongst worldly believers, where their focus is upon their works, instead upon faith in Christ, they will interpret all these things as man caused tribulation, thinking they will control all things by their works and worldly systems, such as worldly religious constructs.