The pre-Islamic Arabs did believe and even worship jinns, but they also had straight up gods like Uzza and crew (and the distinction is very significant). Allah to the pre-Islamic Arabs was a god (the major God), not a jinn.
Allat was a moon god, if I recall.

lol not in the old testament. Old testament is not as "nice" as the new testament
Clearly somebody has forgotten Revelations. "Nicety" is relative.