Y'know, if someone steps into a room and randomly opens fire and isn't aiming for anyone in particular, that's still a slaughter or a massacre. And in the case of the IDF in Jenin, they destroyed with no regard for the civilians that were there. Is it somehow not such a bad thing if they just didn't care? Of course it isn't.
Gosh, now yr fine with my definition all of a sudden, after getting so rage-filled about it over the course of many posts? I wish you'd make up yr mind and stick to it! ;)
on edit: for anyone else who has an interest in what happened in Jenin and have read this far through the outraged 'NOT A MASSACRE! NOT A MASSACRE!' posts, I think you should be rewarded for yr patience with a link to the Amnesty International report on what happened in Jenin. Regardless of what it's called, it was brutal and terrible, and should not be overlooked in favour of attempts to minimise what happened there...
http://www.amnesty.org/en/library/asset/MDE15/143/2002/en/c79afe78-d7bc-11dd-b4cd-01eb52042454/mde151432002en.html