Venus and Diog, I find the connection of world myth and astrology compelling. Much information seems to be in the hands of occult literature but without the reasoning behind it. Argument for the astronomical connections are viewed by the churches as paganism and therefore dismissed out of hand. When researching on the internet, most of the encounters linking paganism and the Christ story are from Christian sources defending their holy corner.
With complete or perhaps willful ignorance of the role of mythology, the Christian is blighted by literalism and the usual grounds for being dismissive is the fact that the parallels of the Christ story are distorted which indeed they are, for that is the nature of myth.
A good source which is backed by academic research, is the that of the late DM Murdock; look up her astrotheology site (Astrotheology of the Ancients).
I too have found the amen Amun question dismissed on the internet but am inclined to think Christians would find it offensive and so would want to deny the connection.