Here is an article that laments the fact that Druidry is now an official, charitable religion in the UK.
It saddens me that people are still so narrowminded and arrogant to believe that only Christianity(or, at best, theistic faiths) deserves special recognition. I'm not sure about in the UK, but I know that here in the US Buddhism is pretty much an established religion. And Buddhists aren't theistic, or at least it isn't a requirement to be theistic, and any belief in gods is kind of a "side comment" to their religion, not a focal point. Indeed, many Zen practitioners believe that Buddhism isn't just a religion, but can also be a spiritual practice to supplement the practitioner's primary religion(as I am beginning to incorporate Zen practices into my practice, I tend to subscribe to this viewpoint myself). Druidry is similar - most practice it as a spiritual supplement, but indeed many Druids do consider Druidry to be their primary religion.
"Judge not, lest you be judged." Too bad so many Christians have forgotten this.