At the start of the Phantom Menace the Jedi don’t try to save him or help him. Multiple times he almost gets killed. Do they just quietly hope something will kill him?
I mean, who wouldn’t?
It may have been a result of Darth Jar Jar’s plan and misdirection.
If they wanted him dead, they could just accidentally force-deflect a blaster bolt into his head, and who would know?
I wonder if Lucas is out there, still, wondering why no one likes Jar Jar.
I didn’t think they wanted him dead, or hoped he was killed.
The overwhelming impression I got was that they wanted him to stay out of their way and hopefully go away and leave them alone, because they had a job to do, and he was this goofy, bumbling alien who was more of a liability than anything else, because he had every likelihood of getting in the way and making things worse.
I also felt like their lukewarm reception of Jar-Jar was the beginning of his redemption arc in the story; he starts out as a bumbling, goofy alien who they don’t much like, and ends up a heroic, bumbling, goofy alien who they sort of like. Which is supposed to be endearing or something… I never got it.
IMHO, Jar Jar was nothing but fan servicing. And the fan it was servicing was Lucas.
Come on, my cynical comrades, you know if Jar Jar gets killed, he’ll ascend to the right hand of Yoda where the two of them will jabber incessantly making everyone else in the galaxy want to poke out their ears with pencils.
Now I’m wondering how Yoda would mangle Gungan sentences.
Treating the question semi-seriously, I think @bump has it mostly. They have jobs to do. Jedi, much like our police, don’t have a clearly defined duty to protect the public, but instead are enforcing the will of the Senate / Council or accomplishing a certain task. Absent those, sure, they’d probably assist those in their immediate vicinity based on personal virtue (for those who have it), or public image, but that’s not their job. I always assumed that one of the reasons they keep the peace, and settle disputes, is because those lead to a greater strength of the Dark Side overall, even among those who are not force-sensitive.
They’re supposed to be dispassionate warrior monks serving a greater good, and as bump points out, Jar-Jar is going more harm than good most of the time.
So they don’t hope he gets killed, and would not take an action to make it easier, but they’re trained to not be invested in individuals.
Being aggressively irritated and aiding in, or hoping for Jar Jar’s death would be flirting with the Dark Side after all. 
“Look at how much the others hate him. I’d be doing them a favor.”
considering he’s the one who officially puts Palpitine in power I wonder if Obi-Wan wished he was accidentally hit with a rock …
Indeed.
Tell Jar Jar it was only business, I always liked him.
It was for his kids, who were around the age that he was orienting the movie towards. When he made the first Star Wars the kids he was making it for were theoretical, but by the prequels they were now manifest in his life and his opinion of what kids wanted had shifted into the painfully twee and annoying.