While religions are interesting and rich in history and rituals, one finds that they remain human constructs formed thousands of years ago in the infancy of our intelligence by people like you and me. The historical context and ancient mindsets that produced these belief systems are abundantly evident. Clearly they are all a part of our very early efforts to understand and cope with the withering and unrelenting demands of life. As such, they should be treated like all other institutions that we have created. Now, ancient and antiquated, these old religions should be studied as history not adopted as belief systems.
Do not believe in anything simply because you have heard it. Do not believe in traditions because they have been handed down for many generations. Do not believe in anything because it is found written in your religious books. Do not believe in anything merely on the authority of your teachers and elders. But after observation and analysis, when you find that anything agrees with reason, and is conducive to the good and benefit of one and all, accept it and live up to it. – Buddha