Thank you for bringing logic into this
It is incredible how woefully ignorant people on this board are of the intelligence collecting process and how you get GOOD intelligence that leads to arrests of the big boys
You must establish trust and rapport to get the good info that is needed. You won’t always get information from intense interrogation in your face yelling and throwing crap across the room
And if you aren't approachable, how is an informant going to be able to talk to you. If you act like an @sshole, you will feed into everything his fellow travelers told him about you.
Of course many found a "friend" in the agent; he spoke their speak and walked their walk.... now they'll speak his and hopefully get some 9/11 wantabes of the street..