Israeli Jews were once in a similar position in which Hamas finds itself. They blended in with the civilians populace and conducted "terrorist attacks". They kidnapped and lynched British solldiers, they killed diplomats and UN envoys, they bombed hotels, they sluaghtered entire villages of civilians, etc. Terrorism helped the Jews to a victory. The Jews of Israel who showed the world how to invade and take a nation in the 20th century now declare that it is not fair for others to follow their example. Actions speak louder than words. Hamas is not constrained by "rules" any more than Irgun or Lehi was. They do whatever works. They don't roll over and give up because the other side is stronger. Every nation and every army has its vulnerabilities..
Jewish youths assault Jew in Jerusalem, after they mistake him for an Arab (Haaretz)
from the article: Convicted Hamas murderer: Shalit swap deal won't increase terror