The word "You" refers to the mountain of Seir. Ezekiel is to speak to the mountain as if it can hear him. The message is for the people of Edom. AT: "Your people said" (See: [[rc://en/ta/man/translate/figs-personification]])
It is implied that Yahweh was protecting Israel and Judah. AT: "but Yahweh was there protecting Israel and Judah" (See: [[rc://en/ta/man/translate/figs-explicit]])
Possible meanings are 1) "I will punish you because of your anger and jealousy" or 2) "just as you acted against the people of Israel with anger and jealousy, I will act against you with anger and jealousy."