I think paranoia can often be a necessary thing in certain jobs, particularly those that deal with security and government issues. The problem is that you can end up with it informing everything.
Imv, that's because most terrorism that succeeds is by definition something that you were not briefed about beforehand. And that is normally attributable to some institutional failure that you can do nothing about at the time so I too would be considering hiding under the bed if I heard what Trepp did.
For instance, how do you manage a group of machete wielding villagers in the middle of nowhere - this appears not to be dealt with in the "information on local customs" leaflet...