Sabra/Shatila and Israeli bulldozers were used to dig mass graves and later,

Again not true.
Like the eye witness at Jenin who "saw" Israelis piling bodies into trucks and driving them away.
A lie to discredit them.

Like the group of nurses on the Marmara who "saw" Israelis throwing bodies into the sea.
A lie to discredit them.

No-one saw mass graves being dug.
It is another lie told to discredit the Israelis by people who hate them.