The problem with this take is that the polls show a strong support for all those things that the Israeli government doing in Gaza among its citizens. That is, the average Israeli does agree. I don't think that the minority that disagrees is to blame, but they also clearly cannot meaningfully speak for the nation anymore.
In a similar vein, I'm ethnically Russian and a Russian citizen. I don't support the Russian invasion of Ukraine in any way, shape, or form, and I don't think that I am responsible for it as a Russian. However, it is also clear to me that the majority of Russians do support it (or at least think that it's fine), and on that basis I don't consider myself to be a part of that nation anymore, regardless of ethnicity.
In a similar vein, I'm ethnically Russian and a Russian citizen. I don't support the Russian invasion of Ukraine in any way, shape, or form, and I don't think that I am responsible for it as a Russian. However, it is also clear to me that the majority of Russians do support it (or at least think that it's fine), and on that basis I don't consider myself to be a part of that nation anymore, regardless of ethnicity.