Jamieson, Fausset and Brown on Obadiah 1:11

11. thou stoodest on the other side--in an attitude of hostility, rather than the sympathy which became a brother, feasting thine eyes (see Ob 12) with the misery of Jacob, and eagerly watching for his destruction. So Messiah, the antitype to Jerusalem, abandoned by His kinsmen (Psa 38:11).

strangers--the Philistines, Arabians in the reign of Jehoram, &c. (2Ch 21:16); the Syrians in the reign of Joash of Judah (2Ch 24:24); the Chaldeans (2Ch 36:1-23).

carried ... captive his forces--his "host" (Ob 20): the multitude of Jerusalem's inhabitants.

cast lots upon Jerusalem--(Joe 3:3). So Messiah, Jerusalem's antitype, had lots cast for His only earthly possessions (Psa 22:18).