Garner Ted Armstrong and the Worldwide Church of God was into identity years ago if I remember correctly. Maybe the other groups borrowed from his theology. I certainly wouldn't consider the former a terrorist.
I'm not into any of that stuff. Death to the new world order ;-).
The Armstrongs were "traditional" type "British Israelites", and while nuttier than a fruitcake, were nothing like the CI bunch. CI took some BI precepts and then worked it into a deadly monstrosity.
Think of the WWCOG as a counterpart to the "peace loving muslims", and CI as a counterpart to the Taliban, and you'll have a fairly decent idea of the relationship between the two groups.