growing up and living in Northern Europe I think there is not just an ethnic
but a cultural
I knew very little of meso Druidry until i sought it out but many of the concepts and ideas behind it were familiar to me. With family in West Cornwall and with family holidays in North Wales I was brought up on myths & legends, some contained Druids and some didn't but there was a familiarity with ancient Druidry.
Then there's the whole Arthurian cycle - which has rippled out along the British cultural diaspora. The concepts within those ancient Northern tribes recorded in the (Atlantic?) Celtic world are the roots of our modern world.
I still read the 'Auracept na n-Éces (The Scholar's Primer)' and see the wisdom within it. In the Colloquoy of the 2 Sages I can see where it has modern relevance. If anything they highlight that the ancients were people not very dissimilar to us.
Finally, I agree with Apritha that it is the land, nature and our human nature that seeks the divine which provides another connection that means Druidry has relevance.
Most dear is fire to the sons of men,
most sweet the sight of the sun;
good is health if one can but keep it,
and to live a life without shame. (Havamal 68)http://gewessiman.blogspot.co.uk