and why did hamas deny it then? and it certainly wasn't hamas who DID claim responsibility for it... so ummm...how do you figure it was hamas? hamas as an entity cannot control the acts of individuals or of factions within it(IF this was the case); just as the idf cannot control the individual acts of its soldiers.
Judge orders Jerusalem Gay Pride attacker to undergo psychiatric evaluation (Haaretz)
from the article: Lebanese report Israeli phone threats following Katyusha fire