The Left hates successful people.
Even leftist successful people hate themselves (especially neurotic liberal Jews, Whites and East Asians).
That's because they're jealous of the success of others and because they're Marxists.
Left-wing Marxism is entirely based upon demonization, persecution and oppression of the successful.
Leftists protray successful people not has talented hard working brainiacs (which they ususally are), but as immoral, dishonest, thiefs and oppressors who exploit the masses.
And since Ashkenazi Jews have the highest average IQ out of any ethnic group in the world, they're extremely successful academically, socially, intellectually and thus economically.
http://en.wikipedia.org/wiki/Ashkenazi_Jewish_intelligence
Jews are also innately peace loving people. They're not aggressive hatemongers who want to spread their religion/ideology over the entire world (unlike the muslims and leftists).
They pretty much keep to themselves.
And even islamic jihad leaders like Osama have commented numerous times that you "infidels (Jewish and Christian Westerners) love life while we muslims love death.
What he's basically saying is that we're soft. We care too much human life and human rights.
And we saw exactl that recently where Israel stupidly released over 1,000(!) islamic jihad terrorists in exchange for just 1 of their soldiers...
The Jews don't want to kill anybody. They just want to be left alone in peace. And are even willing to have friendly relations with you if you just stop trying to eradicate them...
But after the Holocaust and hundreds of years of endless persecution all over the world, they became radical Jewish nationalists who wanted to return to their Holy Land and erect a Jewish state where they could govern themselves without being oppressed.
Hence Zionism and the creation of Israel.
Ashkenazi Jews that were highly educated in Europe, returned to their ancient homeland not as submissive dhimmi (2nd class non-muslim citizens under islamic sharia law) but as brilliant intellectuals and fierce warriors capable of both building a highly advanced 1st world sovreign Jewish state from literally the desert and defending it from muslim jihad aggression.
For all the muslime jihadists who say our "infidel" Western troops are "carried" by technology... ROFL
This REALLY pissed off the international Left.
Because...
1) They were highly successful (something the Left instinctually hates as previously mentioned).
2) They were prepared to use force to defend themselves (something which really pisses off the pathologically self-loathing pacifist liberal Jews and non-Jews alike).
3) Ashkenazi Jews are very fair skinned. They look very similar to native White European people due to centuries of intermarriage. And the self-loathing Left instinctually loathes fair skinned people due to their massive amounts of current and historical success.
So you have these enlightened, highly educated, militant, Westernized Jews kicking the shit out of backwards islamic brown people who want to carry out a 2nd Holocaust...
No shit the Left is going to go totally nuts and denounce the White looking Jews and heroize the evil and primitive brown skinned muslimes they're fighting.
Another possible reason the Left hates the Jews is very controversial. But I think it has some merit.
Basically, the argument goes: The Marxist/socialist Left wanted to overthrow capitalism in the West through a lower/middle class revolt.
They failed - utterly.
So now they've been looking for a new force to overthrow the capitalist West.
Enter the insanely militant islamic jihadists...
So through a bizarre Red/Green alliance (Red = communism / Green = the offical color of islam), the Left has basically teamed up with the islamic jihadists to destroy the West.
Hence their hatred of Israel and their support for Israel's islamic jihad enemies.
And there is indeed tons of evidence to support that (admitted) conspiracy theory.
I personally knew tons of leftists in college who supported hamas, hezbollah, the taliban and the "Iraqi resistance".
So yeah, I think that explains leftist hatred of Jews.