Why would it be political suicide? When people say this it almost feels like a trope that Israel has too much influence you know? Not saying you're saying that, but it's like why? We have free speech, we have observable facts, why can't you critique Israel? Why would it be bad for your career etc.
Free speech and observable facts aren't enough to decide how your foreign policy looks like or should be. There are other calculi and geostrategic considerations that take precedence.
Without even getting into the influence of the pro-Israel lobbies like the AIPAC or the CUFI which can certainly be debated, Israel is an ally and the pillar of the US foreign strategy in the Middle-East. The strategic, economic and religious ties between those two are more than a century old and run deep in the American and Israelian society. There's no way any sane American president or politician running for the presidency would openly criticize them, let alone withdraw any kind of support or put it under conditions, without alienating their most valuable ally in the region and their own population. But you're free to correct me if I'm wrong.
It has been the case since 1948 (date of the declaration of independence of Israel which the US was the first to recognize) and it never changed. The only time we saw the US really jumping in was the Suez Crisis in 1956, in a vastly different context, because of the risk of a conflagration with the Soviet Union and the direct involvement of Britain and France on Israel's side.
Israel has been condemned by the UN in 45 resolutions and violated 28, to this date. It doesn't even declare its official borders. It just doesn't give a flying one about international laws and, in any other case, would've been considered as a rogue state by the current freedom and democracy merchants. Despite this, I've yet to see any instance where the US took a firm stance against Israel's frankly criminal policies in the occupied West Bank and the blockaded Gaza Strip. Every resolution condemning Israel has been systematically vetoed by the US which also provides a yearly $4 billion financial aid. The best you can get from the US is an abstention. It can't be a coincidence and that's something every official in the American state apparatus or potential presidential candidate is accutely aware of.
To my eyes, the US is currently the biggest obstacle to a durable peace and a two-state solution. Israel has no reason to stop its settlement policy and continue to geographically atomize any hope of a Palestinian State, because it holds all the cards and there's no one able or willing to oppose them.
They do it because they can. The Arab countries are weak and their governments corrupt. Europe is guilt ridden, divided more than ever and militarily a nothingburger. Russia has other problems and certainly doesn't have the pull it had 40 years ago. China doesn't want any of it at the moment. The sole and only country capable of reigning Israel in and force them to engage in a two-state process, is and always was the US, but they just won't do it for the reasons I've mentioned above. Unless Israel truly goes off the deep end but we're (still) far, far away from that.
+11,000 dead Palestinians within a month. Among them 4,500 children, more than all conflicts in every region of the world in the last three years combined. A collectively punished and starved Gaza turning into a flattened garbage dump, and pogroms in the West Bank. Yet all of this is still far from enough for the
official US and west-european moral compass to really turn red. Although and to be fair, it seems to have begun because of the real risk of a regional conflagration and the future consequences in the region and the world resulting from this unhinged military campaign.
