You say that, but it is largely impossible to ignore due to how interconnected they are from a historical perspective. To ignore that is to show an extreme bias of one over the others.
There's examples of this everywhere, from how Judaism, not even 300 years before Yeshua of Nazareth (Jesus Christ), was monolatric religion (a belief in the existence of many gods but with the consistent worship of only one deity), that shared a heavy resemblance with surrounding faiths [most notably Zoroasterianism]. Later, 70AD was when the schism between Judaism and Christianity became official and they started becoming fully distinct from one another. When Chalcedonian Christianity started splintering into the various definitions in the wake of the various quote on quote "heresies" that invoked
Apollinarianism (Avatar theory, Jesus was an empty vessel for God to inhabit),
Arianism ("Gilgamesh" Theory, ie Jesus wasn't fully divine and created),
Gnosticism (Emissary Theory, that lesser divinities created existence and Jesus was sent by God to teach the truth),
Monophysitism (Jesus was fully divine), among others, most being some flavor of how to interpret and reconcile Jewish and Pagan doctrine with the Apostles' teachings; some of these early sects remain in various forms, with their teachings either held by the few remaining elder sects of Christianity, such as the
Mandeanism, or recreated by Revisionist sects, such as the Jevoah's Witnesses.
Later still came the Khazars, a nomadic peoples of the Eurasian Steppes, who adopted Judaism, and tended to occasionally invade areas of Eastern Europe that were being slowly converted. In that same vein, and during that same time period, were the generational Jihads that created the Abbassid Empire on the back of the crumbling Eastern Roman Empire, something that would ultimately culminate in the Crusades, with the French Crusaders returning home with tales of the Holy Land, tales that would influence the writings for King Arthur when tales of "courtly love" were injected in a story that originally lacked them.
All of these things and more did not exist in a vacuum, and they must be talked about when discussing any of the three in order to avoid accusations of bias.
