Other questions on this topic has addressed the pre-Islamic religious beliefs in broad detail, including the conversion of near-Arab cultures.
What was the specific nature of the pre-Islamic religious concepts? e.g.
- categorization of beings/anima,
- species of animistic action
- worship, veneration
- contracts, petitions
- funerary
- etc.
We know so much about Greek (pagan) beliefs, by comparison.
It is understood that Christianity and Judaism were operative in the area before the prevalence of Islam. (good answers would naturally make brief mention of these) The question is aimed at the structure of belief systems that came to be known as 'idol worshippers', etc. — many of which are presumed to no longer be practiced.