@Corka : this only happens with shadow factions. Or, if you will, factions that HATE HATE HATE HATE HATE this movie. Errr no, hate you, sorry. Not hate in the "typical American overstatement of mere dislike" meaning of the word. I mean hate as in "the Finns hate Russians", or "North Koreans hate South Koreans", in other words national/cultural antagonisms that run deep, so deep in fact that they exist merely because they exist and have existed for a long long time.

The English hate the French because the French hate the English because the English hate the French. Chips are passed down filial shoulders, grudges become less baggage and more cultural heritage, nay, they become honor, duty, values and other senseless words of your choice. Kinda like old family grudges in small villages.
Suicidal and irrational ? Well, yes, as a matter of fact. Met any rational suicide bombers lately ?