It just doesn't work any more - the schtick wore out. Yes, the mass killing of Jews was a horrible thing. However it is part of the past and can't be used and used an used to counter every present criticism of any Jew or Israel. There was what by all accounts a deliberate lie to get unwarranted sympathy, and you can't hide behind what happened; we live in the present and can't use the past to excuse what is done NOW.
Stabbing reported in Kiryat Gat in southern Israel (Haaretz)
from the article: French film festival disputes Israeli’s account of assault by Arabs