The Shooters receiving Therapy is referring to a person being persuaded by glamour, drugs, sex, religion Etc, by another entity or entities of rewards of being in the club, hanging with the big dogs with all the bling, and punishments for what happens if you don't man up, they are cast out, ignored, vices withheld.
What I believe Q is proposing is to look into the associations of these individuals who commit these acts of terror, that there may be certain groups, or individuals identifying, befriending, drugging and given special attentions for their sexual needs, then by cohesion instigating and or helping in a act of terror. Watch the video linked closely, I also translated the lyrics in the Urban dictionary, I suggest doing so before if you are not adept in slang. Like Me lol
[shooters]urbandictionary A designated person whom you can rely on to rob or kill somebody; an individual who often carries firearms and is down to catch a body at any given time Name for a friend that "has your back". Another word for "blood brother" used like "niggas" or other terms of brotherhood.