The [US is blocking](https://www.rte.ie/news/world/2021/0517/1222016-israel-gaza/)\* what seems to be a simple statement asking both parties to stop violence:

> 
> The United States has today blocked - for the third time in a week - the adoption of a joint UN Security Council statement calling for a halt to Israeli-Palestinian violence and the protection of civilians, diplomats said.
> 
> 
> 

According to the same article the US position is this:

> 
> At a news conference in Copenhagen today, US Secretary of State Antony Blinken urged Israel and Palestinians to "protect civilians, especially children" - and defended Washington's move to block a UN Security Council statement calling for an end to the hostilities.
> "We're not standing in the way of diplomacy," Mr Blinken stressed.
> 
> 
> 

The article adds:

> 
> The US refusal to endorse a joint Security Council statement has been met with disbelief by its allies.
> "We are just asking the US to support a statement by the Security Council that would pretty much say similar things which are being saying bilaterally from Washington," one diplomat told AFP on condition of anonymity.
> 
> 
> 

While this kind of statement is mostly symbolic, it's hard to imagine any downside to doing it.
How would calling for an end to violence cause a problem to any diplomatic
attempt?

---

\* [Edit two days later] The content of the linked article from RTE (including the title) appears to have been heavily modified since this question was posted. Some of the quotes mentioned in the question cannot be found anymore.