Frankly the amount of traumatizing material they are exposed to is probably pretty low. They aren't watching this materiel start to finish by the articles own

Frankly the amount of traumatizing material they are exposed to is probably pretty low. They aren't watching this materiel start to finish by the articles own admission they only have a few seconds to make a judgement. 99% of terrorist propaganda videos can be spotted by only watching the first few frames of video. They all have the same music / tone / symbolism.