Some examples are old testament Israel, French Revolution and the American Revolution. There are many more examples, without knowing the answer though I would bet there are way more idealogical wars among those of the same race than race v race.

You are flat wrong, they do let foreigners in. You seem to be thinking of tribal africans when I said Christian. I agree I would not be welcome among the tribes, But I know for a fact I would be welcome amongst Christians as I was already told I am welcome anytime by Christian Nigerians.

America has been corrupted by communists so no disagreement with you about the ghettos.