What part of Paganism don't you understand?
The first problem is that Lucifer is a Latin name. So how did it find its way into a Hebrew manuscript, written before there was a Roman language? To find the answer, I consulted a scholar at the library of the Hebrew Union College in Cincinnati. What Hebrew name, I asked, was Satan given in this chapter of Isaiah, which describes the angel who fell to become the ruler of hell?
The answer was a surprise. In the original Hebrew text, the fourteenth chapter of Isaiah is not about a fallen angel, but about a fallen Babylonian king, who during his lifetime had persecuted the children of Israel. It contains no mention of Satan, either by name or reference.
The word Pagan is derived from the Latin Paganus, "a civilian", and from Pagus, "a village". This delineates Pagans as those who are from a village, or more commonly, simply country-dwellers. Whilst the majority of Pagans today - like the majority of the population - live in towns, this term accurately describes the Pagan heritage, and the affinity which modern Pagans feel with the natural environment.
Thus modern Pagans follow a religion which is as old as humanity itself, but whose practices have been adapted to suit life in the modern world.