I can answer that. It's because Jews appear to have two positions when it comes to any aggressive acts towards palestinians - either passive or supportive. The supportive ones are just one sided and imo fully brainwashed in their beliefs. The passive tend to come out with the "I'm Jewish not Israeli so why are you holding it against me".
The problem with the passive position is that it comes across as a cop out. It's almost like you're hiding your support. I'll also add that every Israeli commentator will reinforce the fact that Israel is a Jewish state. They'll state that to criticise Israel is an act of antisemitism. So in a way, they're putting it out there, that Israel + Jews is one and the same, which I'm afraid has a knock on effect in how Jews are perceived in the outside world.
Now I'm not saying any of the attacks or vitriol towards Jews is justified, and what I've posted to explain why fckwits confuse the two does not justify it either.
But here's the thing. Following the 9-11 attacks, the 7/7 bombings and that whole period of terrorist attacks across the world in the 2000's, there was huge pressure put on muslims to distance themselves from these acts. 99% of mulsims didn't condone the butchery by the extremists but they had to make the effort of publicly condemning it at every opportunity. Has that ever been asked of Jews in terms of them illegally occupying Palestinian land or the acts of a Jewish state in their name? Of course not.
Let's take this a little further to perfectly example this. The antisemitism within the labour party was wholly unacceptable, to harrass and discriminate ppl based on the fact they're Jewish was shameful. I listened to those Jewish MP's and was embarrassed as a Labour supporter. But then I ask the question which has nothing to do with justifying the discrimination against them, but to ask the question, should they be expected to speak out against Israel? Not because if they don't then they should receive pelters, but because there is some responsibility on them to do so when they don't support Isreal's actions. Margaret Hodge is one of the few who I'd say does at least do that. And to highlight my point she's right when she says, it's not pro-israel to remain silent" but what she means is you're not doing Israel any favours by staying silent against the right wing extremist path it's treading.
I'm not sure what the solution to this is though. Fwiw, Jews around the world and especially here and in the USA are vocally opposed to the current Israeli government. Couple of previously unthinkable developments just this year include the historically right wing (religious, pro settlements etc.) youth movement Bnei Akiva UK coming out and distancing itself from the current govt, condemning numerous ministers for comments about both the Palestinians and LGB matters, even refusing to allow them to speak or share material at events and programmes. That was unprecedented.
And just last week one of the largest and most important Jewish charities in the world, the UJIA, for the first time started enforcing conditions on activities and initiatives slated to be conducted across the Green Line. Again, unprecedented and previously unthinkable.
Meanwhile across the pond, the vast majority of American Jews vote democrat and whereas the overwhelming majority (76%) consider Israel an important to their Jewish identity, fewer than 40% support the current government. There's a lot that is happening that you may not know about because you don't know where to look.
Beyond this I suppose the question is just how much noise do we expect a people who constitute fewer than 0.2% of the world's population to make?
Sure, if we believe, like some on here clearly do, that this 0.2% controls runs the whole world with some sort of hive mind, then sure - they should make a hell of a lot more noise, because they can.
If we reject the tin foil though, it does get harder and you do begin to realise that a huge amount of the blindly (i.e. blunt refusal to ever condemn) pro-Israel rhetoric and noise comes from the Evangelical community in the USA which is large (90million), powerful (vote Republican), enormously wealthy and believes that the Second Coming cannot occur until such a time that the majority of world Jews live in Israel.
Which is perfect for Netanyahu as he goes "is it ok if I put them in this settlement I built in this hill?" And 90million people who dominate the GOP (the party which again, the vast majority of US Jews do NOT vote for) all go 'sure dude'.