If it's a "well-known and accepted phenomenon" then it should be very easy to provide actual evidence of it among leftist leaders (eg elected politicians). "This relatively obscure terrorist group received some level of support from some leftists (although I will not present any evidence of this support) in spite of their once doing an anti-semitic action" does not remotely provide evidence of what you're suggesting. I think it's particularly important that you substantiate this claim, since you are using it to try and smear anyone protesting against the ongoing Gaza situation.
0) Germany and Europe in general is sensible and doesn't vote anyone more leftist than the Social Democrats into power. 'The Left' is hardly a group you connect with having positions of power, do you? And mentioning the Doctor's plot would be unfair...
1) That wasn't an 'obscure terrorist group', but a major domestic problem for the BRD. As I said, terrorism was different back then.
2) Where did you get that this was a one-time thing? People don't wake up one day saying "I think today I'll hijack a plane and kill me some holocaust survivors!". It's an example, man - have some goodwill!
3) I'll have to give you links in German, but I think that's justifiable - we're talking about a European phenomenon after all, the situation is bound to have been different in the US.
'Where leght and rift meet' (the pun works better in German)'Complicated anti-semitism debate''Like the thunderstorm in the clouds', a piece on a book about the roots of terrorism in the BRD. This one will probably be the most interesting article for you, since it has a historical overview in the beginning.
And a piece by our leading leftist Gregor Gysi on the relationship between Die Linke - his party - and the state Israel. I only skimmed it, and he's one of the more sensible politicians we have - I agree with most things said in there, but it might shed some light on what debates those guys still are having.
Ant, some leftists did survive the War - if the left or parts of it were anti-semitic before, they have been anti-semitic afterwards. And the DDR's policy of having nothing to do with Nazi Germany is worth a mention here as well... Plus a lot of the really bad stuff came into being during the '68 movement, so the Neuen Bundesaender may not have been touched by that as much.
And I don't recall claiming it was 'widespread', just that it was much more widely spread than one would naively assume...
Edit: Poh, the German article has this bit:
Die Terroristen „selektierten“ die jüdischen Passagiere von den anderen.[11] Neben den israelischen Staatsbürgern waren dies 22 Franzosen und ein Staatenloser.[12] Die übrigen Geiseln wurden freigelassen. Die verbliebenen Geiseln ohne israelischen Pass wurden aufgrund ihrer vermeintlich jüdischen Namen oder anderer Indizien – teilweise fälschlich – als Juden identifiziert.
'The terrorists 'selected' the Jewish passengers from the others. In addition to the Israeli citizens these were 22 Frenchmen and one stateless person. The remaining hostages were freed. The remaining hostages without an Israeli passport were identified as Jews - sometimes wrongly - by their supposedly Jewish names or by other clues.'
So no, it wasn't selection by citizenship...