Do the jinn and satans see Allah and know of His existence, and why do they harm humans and possess women despite knowing the prohibition of such acts? Do they not fear Allah?

The jinn do not see their Lord, glorified and exalted be He, for His saying: "No vision can grasp Him, but His grasp is over all vision." Many of them are aware of His existence, and among them are believers and disbelievers. The disbelievers among them are keen on misguidance and leading astray, as Allah recounted the words of Iblis: "He said, 'By Your might, I will surely mislead them all, except Your chosen servants among them.'" As for the disobedient believers among them, their weak faith and lack of awareness of His watch over them lead them to disobedience and harm.