blech, no it isn't.
Americans largely do not support this genocide.
The israeli government, most Israeli citizens, and the idf are supporting and continuing a genocide they have perpetrated for decades.
The US is one of many countries that sells weapons to Israel and provides them with aid, continuing over half a century of mutual support.
that does not make the US equally culpable as the Israeli government and military making the decision to continue genocide and defy the UN.
The Israeli government and the IDF are choosing to perpetuate this genocide.
"why isn’t the U.S. stopping Israel, as it surely could simply by pausing the constant flow of weapons?"
One of the reasons is that pausing us weapon shipments would not stop Israel at all.
The US is one of a couple dozen countries regularly supplying Israel with weapons.
Israel has a huge stockpile of weapons, and even if they had zero weapons, one country not selling them weapons would not stop the other two dozen countries selling weapons to them after fifty years or more of providing military support.
another reason is that playing this final card removes any tangible control the us has on the situation politically.
at this point, i personally think a sale of weapons pause is the right idea, but the joint Chiefs of staff highly value Middle Eastern stability that they maintain through strong Israeli military support and are not going to sever ties with their largest and most powerful ally in the Middle East without a reason to (go to the protests).
there are lots of reasons why the US hasn't paused weapons shipments, but this article isn't going to supply any real answers because they're pushing a short-sighted, ill-informed, inaccurate opinion piece rather than critically and realistically analyzing the situation.