I hope they put him out of his misery -- But I don't think it'll do any good. Arafat is just a mouthpiece, and a shakedown artist.
This gets a big "so what". The real Palestinian leadership is now symbolized some Jihadist in an Armani suit (including tie, shocking!) currently making the rounds of the networks.
Sad to say, but the Israelis are too late. Going after Arafat may be personally satisifying, however the real problem are the scum Islamics. Getting rid of them is going to be an iffy proposition, one that requires a brutality not associated with the IDF.