The United States remains Israel's closest ally and largest provider of military aid, yet relations between US President Joe Biden and Israeli Prime Minister Benjamin Netanyahu remain strained.
At the heart of the clash is the growing number of civilians killed and the humanitarian crisis in Gaza, where the UN warns that more than half a million people - a quarter of the population - are on the brink of starvation.
Biden has become increasingly vocal in his call for Israel to allow more humanitarian aid into Gaza without justification.
The American president has emphasized that Israel has its right "to defend itself from the attacks of Hamas, but it must also allow supplies to the Palestinians."
For his part, the Israeli prime minister insists that aid is being allowed, but blames Hamas and the UN for failures in its distribution.
But the UN, for its part, blames Israel for the attack on the police who were securing the convoys. In doing so, Netanyahu hit back at the US president for his criticism and warned that he was doing more harm than good to Israel, telling Mr Biden he was wrong on both counts.
"Trying to say that my policies are my private policies that are not supported by the majority of Israelis is false. The vast majority are united like never before and they understand what is good for Israel,” Netanyahu told Politico on Sunday.
Israel is the world's largest recipient of US military aid, supplied by Washington with about $3.8 billion in weapons and defense systems each year.
Netanyahu has declared that he will go ahead in Rafah.
"We will go there. We will not leave Hamas. You know, I have a red line. You know what the red line is, that October 7 will not happen again," Netanyahu said.
Among the critics of the US policy are some who have spent decades implementing it.
Josh Paul, a former senior State Department official who resigned last year in protest over the impact of military aid to Israel, said the administration should obey US laws restricting arms supplies if one country is thought to be restricting access to US humanitarian aid, the BBC reports.
"The use of the US Air Force, or the construction of this pier [to deliver aid]... both of these are being done because the administration has not relied on Israel enough to open land lines of aid to Gaza," he stressed. .