Is it permissible to curse the occupation in general, and the Zionist occupation in particular, by saying: "May the occupation be cursed" or "May the curse of Allah be upon the Jews"?

There is no harm in cursing unnamed perpetrators of sins. It is permissible to curse those described by blameworthy characteristics, such as "May Allah curse the wrongdoers" or "May Allah curse the disbelievers," due to the occurrence of prophetic hadiths like: "May Allah curse the woman who adds hair extensions and the woman who asks for them to be added," "May Allah curse the one who consumes usury," and "May Allah curse the image-makers." As for cursing a specific person characterized by a sin, the apparent meanings of theths indicate its permissibility, even though Al-Ghazali pointed to its prohibition except for someone whose death in disbelief is known, like Abu Lahab.