Did not read that far in. To be more specific, from personal anecdotes, it is far more than regional. Neighboring tribes will kill somebody and blood feud can

Did not read that far in. To be more specific, from personal anecdotes, it is far more than regional. Neighboring tribes will kill somebody and blood feud can and often does go on for decades. Guys I know, when they go to Sana'a to their village, they must drive at night, you know, because snipers. Steve Martin's LA traffic scene has nothing on Yemenis! (And thanks for catching the obvious, did not finish an article like that in 5 minutes.)