Now Ive seen in the British Museum a moderate sized cross with a circle that I belive is called a Celtic Cross, this artifact predated Christs execution by some considerable number of years, so I do feel both the society, and Hislop have some legitamate reason to associate the cross with Tammuz the Sun god worship, the circle being the sun and the cross being the sacred "T" of Tammuz.
And why therefore would Jehovah have his son associated with such a pagan religious image?
Having said that, is it not conceiveable that as this was Satans finest hour, the brusing of the heel, that the implement of Christs suffering could indeed be a symbal or identifying mark of the false god, Satan, who arranged such? That Satan could use his device to take the life of the son of God and to be perpetually worshipped for it afterwards?
My point being that even if the Romans did use the cross, this doesnt make the cross a "Christian" image as it was indeed Satans tool and one that was previously associated with sun worship.