This is true, and a point I have tried to make about there being European commonality. The problem is that this is selectively used to serve other ends. A Germanic tribe and Gallic one are not radically different peoples, especially if they were right next to each other. Universalists are usually liberals that use these facts to justify the Great Hijra into Europe or some other agenda of theirs. Is there not enough diversity in Europe already? Land should at least be fought over before it changes hands. This is the number one reason I am suspicious of universalists. I aimed what I said about “dividing Celts and Germans” at this. For some reason the universalists and even Christians like to try that. If they were better at this, they would try the Germanic-Slavic divide, there is a real conflict and point of controversy. The Slavs versus other Slavs is a pretty fierce conflict too. The whole thing about mixed European groups is used right alongside “Europe was always diverse” and then listing out different European peoples. Africa has more varied groups within it than Europe(some radically different) and yet a handful of Europeans coming there is not said to have added to its vibrant diversity.