Reitzenstein and Qumrân Revisited by an Iranian

The following remarks are intended to be merely general indications of overall problems which nonetheless, I believe, are necessary before one investigates specific words or concepts which may be borrowed by one culture from another.
The controversies over the Iranian mystery religions, Iranian gnosis, and the Iranian origin of most dualisms in the ancient world, had died down by World War II. But the discovery of the Dead Sea scrolls, as well as other new materials, has raised again the spectre of substantial Iranian influences on Israel and Greece. It might be useful to recall briefly certain historical backgrounds which may help to clarify the general problem of Iranian influences on the religious thought of her neighbors.