You may be interested in The World’s Sixteen Crucified Saviors, or Christianity Before Christ, recently released over at Project Gutenberg.
“The Christian bible, like other bibles, having been written in an age when science was but budding into life, and philosophy had attained but a feeble growth, should be expected to teach many things incompatible with the principles of modern science. And accordingly it is found to contain, like other bibles, numerous statements so obviously at war with present established scientific truths that almost any school-boy, at the present day, can demonstrate their falsity. Let the unbiased reader examine and compare the oriental and Christian bibles together, and he will note the following facts, viz:—
1. That the cardinal religious conceptions of all bibles are essentially the same—all running in parable grooves.
2. That every chapter of every bible is but a transcript of the mental chart of the writer.
3. That no bible, pagan or Christian, contains anything surpassing the natural, mental and moral capacity of the writer to originate. And hence no divine aid or inspiration was necessary for its production.
4. That the moral and religious teachings of no bible reach a higher altitude than the intelligence and mental development of the age and country which produced it.
5. That the Christian bible, in some respects, is superior to some of the other bibles, but only to the extent to which the age in which it was written was superior in intelligence and natural mental capacity to the era in which the older bibles were penned; and that this superiority consists not its more exalted religious conceptions, but only in the fact that, being of more modern origin, the progress of mind had worn away some of the legendary rubbish of the past. Being written in a later and more enlightened age, it is consequently a little less encrusted with mythological tradition and oriental imagery. Though not free from these elements, it possesses them in less degree. And by comparing Christ’s history with those of the oriental Gods, it will be found:—
1. That he taught no new doctrine or moral precept.
2. That he inculcated the same religion and morality, which he elaborated, as other moral teachers, to great extremes.
3. That Christ differs so little in his character, preaching, and practical life from some of the oriental Gods, that no person whose mind is not deplorably warped and biased by early training can call one divine while he considers the other human.
4. That if Christ was a God, then all were Gods.