That's an interesting way to look at it, and I believe an accurate one. The Northern Kingdom has come to Christ, but the Southern Kingdom has not. The bulk of Christianity today is made up of House of Israelites.
(The error in much modern thinking is that todays Christians are "Gentiles". They are indeed Jewish Gentiles, but they are not Israelite Gentiles, for they are Israelites.)
Well, if the Celts were Israelites, then chances are the Saxons, Anglos and Germanic tribes were, too. They all appear to be the same racial stock. Europe is Christian and likewise its children: America, Austrailia, New Zealand, ect. Seems to be a logical assumption.
Judah need to upgrade to Covenant v 2.0. They've been running spiritualware no longer supported by GodSoft.