The first reason for the four judgments, this against Damascus for their threshing of their threshing of the Gilead region where the two and a half tribes settled on the other side of the Jordan, Gad Reuben and Manasseh.
The forth reason for the four judgments, this on Edom itself. Edom, the descendants of Jacob's brother Esau in their unrelenting wrath not only received all the Israelite captives from Damascus/Gaza/Tyrus but pursued more with vengeance.
Edom and Ammon are at the center of these reasons so far with assistance from Damascus Gaza and Tyrus. These are all kin to Israel rooted deep with the patriarchs, but, have long been enemies and sore spots to Israel. They have taken their hostility way too far (as kin folk often do) and violated common brotherly/tribal/national sensibility.
2012 - pBiblx2 Field Wise Bible System Version 2.0.9d - GPL3