Where in the New Testament is judgement threatened as a consequence for national sins...?
Why do you see a need to separate the New and Old Testement?
Because the Old Covenant is over. New Covenant values and imperatives stand in sharp contrast to the values and imperatives of the Old Covenant. It was the New Covenant values and imperatives that influenced Western Civilization. Jesus ended the Old Covenant once and for all.
'' Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law'' according to Jesus.
Patriotism (and religion) is the last refuge of a scoundrel.
