Charlie Winter, of ICSR @ Kings College London, has been cited before on the information campaign of ISIS and AQ. This week he spoke at a UN meeting on countering terrorist narratives and preventing terrorist use of the Internet. You can read his short speech or watch it.

He ends with:
Whatever happens, it is crucial that all involved understand that counter-strategic communication campaigns levelled at Da’esh could end up aiding al-Qa’idah if they are wrongly calibrated. The two groups’ rivalry is not a zero-sum game, but a loss for one could still end up being a win for the other—and that could prove to be catastrophic.

I could not readily identify a previous thread, especially as IS and AQ were kept separate.