Here is the blood part as it applies in the US:
Jus sanguinis (Latin: right of blood) is a principle of nationality law by which citizenship is not determined by place of birth but by having one or both parents who are citizens of the state.
It seems strange to me that so many do not understand this.
Jus sanguinis (Latin: right of blood) is a principle of nationality law by which citizenship is not determined by place of birth but by having one or both parents who are citizens of the state.
It seems strange to me that so many do not understand this.