I've always felt that what defines us Druids is not what we believe, but what we do.

It is the activities of our specific druid path - the observance of the
eightfold year, working with the spirits of the circle, viewing spirituality
through druidic symbolism and the druid's prayer, etc. - that allow people of
such divergent belief systems to identify with each other and create the
sense of community that we have.

Our beliefs need not be identical, only congruent enough to allow us to work
together in harmony and love.

–Kirk 1998