For a great teaching, having a branch hall annihilated is an extremely face-losing event.
If it was another great teaching that destroyed their branch hall, especially one much stronger than them, they might settle with a few verbal rebukes and leave it at that.
After all, they are not the rivals of such a force, but if the one who destroyed their branch hall was a minor sect, especially one from some remote region, or it was the work of some other small power.
They would surely seek to completely obliterate that opponent, even if they find themselves in an extremely difficult situation, they still must act.
If they do not obliterate the other party, other forces will only further look down upon them, considering them weak, and their situation will become even more difficult.
The branch hall of Heaven Prayers Sect that was destroyed had even established a dynasty, but in the end, it was annihilated by the various Immortal Sects of the Eastern Wasteland.
