Your Christian apologist web sites never get any more convincing.
Educated people understand that Christian mythology is rife with pre-Christian, pagan motifs. All the apologist whining, and equivocating and special pleading in the world isn’t going to change that.
The slaughter of the innocents in Matthew is a rip off from the infant Moses story in Exodus which is a rip off from the Egyptian Sargon myth. The Madonna and Child imagery in Christianity is a rip off of Isis and Horus. Dying and resurrecting gods are commonplace as both agricultural and astrological metaphors. Human virgins got boned by gods and knocked up with demi-god bastards all the time. Nothing in Christianity was mythologically original (or ethically either, for that matter). It was just one more mystery cult that was fortunate enough got the backing of a king (who wantted to pacify his mother who was a fantical convert) and so acquired acquired the military and political ability to eradicate competing cults. If Constantine had chosen Sol Invicus instead (which was mythologically close to the same thing), you be making all kinds of arguments as to how Sol Invictus was totally original and unique and had no relationship at all to any other mythological motifs from 2000 years ago.