The answer was the KKK. One of the other characters drew a comparison between terrorists and gangs. Of course, this points to the "poverty leads to terrorism" argument (link via tam) that some people are citing as the reason for attacks.
Anyway, the interrogation of the White House employee (because his name matched that of a terrorist's) who's parents/ancestors happened to be from Saudi Arabia was especially poignant. So much suspicion, so much intimated distrust. The apology scene was not quite enough, IMO.
We also watched Enterprise (poor Jason, but at least it wasn't HGTV [grin]). It was pretty good, although the allusions were a bit obvious. Some character development for the crew. Some protocol development (in opposition to T'Pol's advice) for Star Fleet. Nothing major to write home about, but it was entertaining.