kalisto, it sounds like raenna has answered your question, if, by satanic worship, your uncle is referring to the fact that all religions other than Christianity are devised by Satan.
Knowing absolutely nothing about Satanism, I read this link:
http://altreligion.about.com/library.../aa052003a.htm
If the summary there is accurate, diverse beliefs are all lumped together under the term...kind of like most other major religions.
Wdevauld, I share your view that all religions are correct and therefore not inconsistent with one another, if viewed as metaphor. The problem arises where practitioners of their faiths see, as literal truth, the "facts" comprising their religions. Incidentally, I don't think it would be OT for you to tell us what you think God is, and invite your response...it can't be a whole lot weirder than the spiritual journey kalisto and others here are engaged in.