Your message is ambiguous. Do you mean that, either : The Israeli army sent this rocket (and the last 100 too), or that other Palestinian groups sent them and the blampe goes to Hamas? Does it really matter what name sends rockets to kill and maim? They come from the south so the response must go south!
Rocket alarm sirens sound in southern Israel (Haaretz)
from the article: 'Israel will defend itself from Gaza rockets, regardless of Goldstone'