Steve,
You must be the only person in the world who thinks that the massacres were carried out by an "Arab militia." Absolute racist nonsense.

Arab militias Steve. An historical fact. Which of them do you doubt and I will give you chapter and verse.

I want you to tell me about a direct Labour source that says he was EXPELLED FOR ANTISEMITISM,

He himself says he was expelled over the media reports of his antisemitim.
I am sure you care as little for what I believe as I do you, but the Labour Party does not believe his protests and denials.
He is still suspended.

burble on about "decent democratic countries" as though there's some objective measure of what that's supposed to mean.

I am sure everyone else understands it to mean liberal Western democracies such as EU states, Canada, Australia, Scandinavian states, etc.
Now you understand my shorthand too.

Jim,
Tell me one country that has ever disputed Isreal's part in the Sabra Shatila massacre

See above Jim. No decent state would continue friendly relations with a state they thought guilty of such an atrocity.

She reported seeing the bulldozers on the site - the help with digging the graves is a known fact

No. She reported a single bulldozer by the camp entrance moving earth.
It is a made up lie to say "the help with digging the graves is a known fact." It is no such thing.

Human rights enquiries

Huh??

eye witness accounts have confirmed Israel's culpability

"Eye witnesses" frequently lie against Israel.
Remember the nurses on the Marmara who "saw" Israelis throwing bodies into the sea?
Remember the "witnesses" who "saw" bodies being trucked out of Jenin?
All lies

Not one reputable, independent group has absolved Israel from this massacre.
No decent democratic country holds them responsible.

You asked for proof that you support mass murder - ther - you have it AGAIN

There is no such proof. You certainly have not produced anything that challenges Israel's version of events.