Ok, so I'm gonna 'as a Jew' in response. 😉
I don't think that's a great article in many ways, agreed, but I'll look at your questions.
'Why should Jews all over the world be accountable for the actions of the current Israeli government?' - We shouldn't be, I don't imagine he's saying we ought to be, but he hasn't made that very clear.
'What other group gets treated like that?' well, people do also get aggressive and prejudice about Muslims for the actions of extremists, though it's not quite the same. The fact is, I think Jews are in a unique position as a group scattered across the world who are of the countries we live in, of a religion and also have this unique association with a single country, without having to be or ever having been citizens of it. So part of the difference is not necessarily that loads of people are just dying to be antisemitic, but this really specific identity scenario we have going on.
For my money, yes, Netanyahu's actions have painted targets on all our backs. Of course, that doesn't demand anyone go for those targets and their existence doesn't make attacking us OK in the slightest. But I have the right to be pissed off that Netanyahu and co put them there. It's utterly unacceptable to attack Jews on a presumption of a support for Israel's actions, or as a proxy for striking at Israel, but even in places that have been very good to and for Jews, like the UK, Israel's actions have created for some an excuse for hate that those who perpetrate it can try to justify themselves with that wasn't there before
I'm also annoyed because the Israeli government doesn't care they've put that target there. In fact it suits them because it allows them to say 'See, everyone in antisemitic and Jews are only safe in Israel' further entrenching a seperatist, isolationist idea of Israel and Jewry, which is not healthy or sustainable for either.