Both countries have gasbags in high office who don’t speak on behalf of either their government or their people.
I don't think its that simple.
The Israeli FM's comments were targeted, direct and strategic. He slandered the Taoiseach directly (and Irish people indirectly - who elects him?) and contrasts an ahistorical view of Ireland's WW2 foreign policy position with the modern day context. It's easy to dismiss this, as we know it's not true. But its not for here or Israel, for that matter. It's strategic messaging, backed with serious diplomatic action (closing the embassy) to undermine Ireland at the political level and shaping the narrative that Ireland is a bad actor generally. There's significant cross over between the pro-Irish and pro-Israel political camps in the US remember.
It's political warfare no doubt, and Israel are experts at this by the way. Harris did the right thing by not responding directly. Higgins made a massive cock-up, responding directly and then tripping over himself. That will feed this.