I did and it appears as if you are an adherant to at least some form of British Israelism. Not that I have any problem with that.
Hmmm... make that "Celtic Israelism" and it would be closer. ~ggg~
In the time I spent in England/Europe I discovered the definition of "Celt" varied widely from place to place, meaning it didn't have much meaning at all. It was what you wanted it to be. For example, in Ireland I asked the question "What is a Celt", and the answer often came back "A Catholic", as in the Holy Celtic Church.
In England, they thought the Celts were the smaller darker people who lived in Cornwall and Wales. In France they thought it was the smaller darker people who lived in Brittany, etc. In fact, these shorter darker people are simply the mixed offspring of the survivors of the MANY shipwrecks over history from trading with the Med, both before and after the Roman Empire.
Similarly, there many fine coffe table books about the Celts, full of grand photos, but the narratives are just hacks from various authors and sources of dubious repute, all quite provincial. From all of that I became convinced that too many authors were missing the forest for the trees, and later research seems to be bearing that out.
After 20+ years of research and travel and PostDoctoral work at several major European Universities, it is my carefully considered opinion that the Celts are indeed the rootstalk of most of Northern and Western Europe (not just Britain). Furthur, the Celts are none other than the Lost Tribes of Israel. (See my Profile for some of the rationale.)