The orcs were the ones who’d instigated the war, and on top of that they’d committed such a huge atrocity afterwards. The elven and halfling gods would not support them much. They thought the orcs too ruthless, and developed a desire to contain them.
This put the orc gods in a predicament. If it continued without end, they would likely only be able to find allies from the abyss or the hells.
This was why the orcish gods went all out in their search for new blood, especially the Blackblood Tribe in the Moonwood and the God of the Hunt, Malar. Orcs and werecreatures weren’t much different, and they even looked rather similar.
On top of that, Malar’s original form was that of a huge ape-like monster, so there was a high chance of him joining their side. With their tough situation, the orc gods would be relentless in their pursuit of this chance.