Sure, it's tempting to let bygones be bygones if you are emotionally supportive of the perpetrators. But if holocaust history teaches anything, it is that you cannot leave war crimes unpunished, otherwise they will occur again, only 10-times worse next time. Killing unarmed people in cold blood after the cessation of hostilities constitutes a war crime, by any measure. The evidence indicates that this is case that needs investigation, not whitewashing and obfuscation.
Suspect Bangkok bomber arrested, found with possible bomb-making materials (Reuters)
from the article: Mubarak urges punishment for alleged Israeli killing of POWs in 1967 war