פּירוש אויף דברים 29:23

על מה עשה ה' כה לארץ הזאת, “what has caused the Lord to do this to this land?” If there were murderers and adulterers among the Jews, this is a world wide phenomenon and G–d has not reacted similarly against them? Why has only their land been laid waste?

ואמרו כל הגויים, when they are faced with these incontrovertible facts.

ואמרו כל הגויים, “and all the nations will say, etc.” their attention is drawn to the extraordinarily long time that the blight of that land will continue.