You need to be Muslim.
He shouldn't be working in a (high, sensitive or military) position, and he should not be working or studying outside the KSA.He can only marry a woman of these three religion (Muslim-Christian-Jewish).It is easier to marry a woman who was born in KSA.
Yes
Only if same sex marriage is legal.
Of course it is
No, because the Muslim woman should not marry a non-Muslim man. If the woman does marry a Hindu, the marriage would not be legal according to the religion's law.
As long as the marriage is legal. Then your passort is legal.
No. An engagement is a promise to marry. In many jurisdictions an engagement is a legal commitment with the possibility of legal consequences if the engagement is broken. A married woman cannot make a legal promise to marry someone else. She is not free to marry until she has legally dissolved her existing marriage.
No. Since the woman is his widow, he is dead. Dead men cannot marry anyone.
Sure, interracial marriage is legal in all states. If she's an immigrant she will need to apply for citizenship.
No not unless he become a legal U.S citizen. Which takes many years.
As long as both are single and they are not closely blood related, it is legal for any adult to marry any other adult.
You have to be 18 to marry without parental consent in England, Wales, and Northern Ireland, and 16 in Scotland.