Connections to the First Holy Roman Emperor and a fake Crucifixion?

There seems to be a strange game afoot here, especially with the works of Monsieur Baigent etal, that stems from Central Germany prior to the first millennium. From all the works that we have poured through, and the centuries of authors and romancers that have penned our tales, Baigent and company are alluding to the possibility that there may be a deeper part to our stories, similar to Mada Weston's belief that the tales are connected to the rites of Adonis. What are we therefore missing fellow questors? Could it in fact be true that Dr. Henry Jones was onto something (even if he is fictitious as most of us are/maybe)?

There is a deeper connection into the Poor Knights of the Temple that we are not and more than likely cannot see due to their history of secrets that have now become enshrouded in myth. These Knights Templar are a deeper key to understanding what has driven us to seek the Grail, from my striking down the Fisher King, Lancelot and Gawain's visits to the Fisher King's castle, to Percival and Galahad's Grail adventures that secure the secret to and the physical manifestation of the Grail. But can we still be so certain as to the identity of this grail? Did not the Celts, the Welsh, and Sir Wolfram not say that the grail were entirely different items that had little "grail" means as a cup but we something else, be it a stone or a cauldron?

Why has the mystery of the Grail separated from the Spear/Lance and the Severed Head/Dish? Why did the Knights of the Round Table and the Poor Knights of The Temple become only interested in the cup from the Last Supper that caught the blood of Christ? Can we even believe that historically and realistically that Christ was actually crucified beyond faith alone? Deeper into the pages of Holy Blood, Holy Grail they mystery unfolds, and even if it can't be proven this late in history, at least the authors make an interested and well defended thesis that Christ was never really executed, but used it as a ploy to manifest spiritual power over the suppressed Jews of Jerusalem.