Just remember, these are the same people who insist that Celts originated from Central Asia (and are in fact the True AryansTM) and spread all over the world. Some of them even claiming these Central Asian Aryan Celts were dominant in Africa and the Americas. But somehow only the Celts in Ireland survived once the Iron Age hit, and all the great technical prowess of the Central Asian Aryan Celts was lost.
All of that while forgetting Celtic tribes existed into the modern age in France and Spain, at the very least.
Oh, and that great technical prowess the Central Asian Aryan Celts had? Some of these jackasses insist they had electronics more advanced than is available today, and it was all lost in some great big apocalypse.