Paganism, part 2: how does one become a druid? You ask nicely
What do pagans actually believe in? GK Chesterton's famous quote is frequently invoked: "When a man stops believing in God, he doesn't then believe in nothing he believes anything." Unfortunately for easy analysis, the issue with pagans is more that they believe in lots of anythings, but what those anythings consist of is open to substantial debate.
I remarked in my previous article that currently pagans are realising that they don't really have much in common with one another. You'd think this would have been apparent from the get-go, and I'm sure in ancient times it was, but both wicca and, to a lesser extent, modern druidry, were set up in part as a reaction to prevailing Christianity and culture, and thus you have alliances that are somewhat artificial: more of a question of defining something by what it is not, rather than what it is. The demographic is changing these days, but a number of pagans came out of repressive Christian upbringings and fled as far as they could towards one of the principal opposites available to them.
http://www.guardian.co.uk/commentisfree/belief/2013/jul/22/paganism-druid-pagans-god-repressive-religions