It was obvious from the start that Israel's killing of tens of thousands of Palestinians wasn't genocide. So why press charges against its political leaders? This move was purely politically motivated either by the DA (a Muslim) or the leadership of the ICC.
The U.S. is a hyperpower that does not want to be hindered by a politically influenced extra-judicial tribunal.
Trump obviously wants doesn't want his hands tied when he decides to bomb all the power plants in Tehran and Iran to force the country to its knees. The fact that this might be interpreted as a war crime has withheld him from ordering this up until now. Iran, however, is bombing civilian infrastructure almost on a daily basis yet I haven't seen any arrest warrants for its leaders being issued.