Israel is always on a hair-trigger against the faintest whiff of criticism. It's why almost everybody of any significance is terrified of giving them even the faintest whiff of criticism even when they richly and profoundly deserve it. Dictators often fall into the same trap (aptly named the "Dictator trap") when they make their administrations and subordinates afraid to criticize them and as a result end up finding themselves surrounded by yes-men and sycophants and become increasingly disconnected from reality. Criticism is necessary and important feedback for any nation, organization or person, and by instantly denying it and calling every hint of criticism "anti-semitism" Israel have spent decades robbing themselves of the ability to use any criticism to learn and guide their own actions. It's sad, because it's actually very understandable why Israel is so sensitive to criticism after what they lived through in WW2. We are literally seeing the legacy of generational trauma on a national scale. They now hurt others because they have been hurt so badly themselves. They are even hurting themselves because they are so afraid of being hurt again.

The reason they think all their actions in Gaza are completely justified is because they have pre-emptively shouted down anyone who might give them any contrary idea. Even people who are Jewish or Israeli are accused of anti-semitism if they criticize settlers, zionism, the IDF, or anything else Israel does. When you refuse to even engage with any views contrary to your own established point of view, you're creating an information bubble which may or may not have any basis in reality, and you'll never even be able to know whether your position is based in reality or not because you're simply not engaging with any other views that could ground you in reality.

Well, the head of a G7 country accusing him of genocide is a pretty big deal.