Not as though. — The scholar will observe that there appears to be here a mixture of two constructions, “the case is not such that,” and “I do not mean to say that,” “I do not intend to say that the case is such as that.”
Taken none effect. — “Fallen through,” or “failed of its accomplishment.”
Of Israel — i.e., descended from Jacob. (Comp. Genesis 32:28.) The promise of God was indeed given to Israel, but that did not mean roundly all who could claim descent from Jacob without further limitation.