Transferring weapons to Ukraine openly has the advantage of sending a message to the Russian government that the West is committed to helping Ukraine, something that (a) Putin has not counted on before the invasion, and (b) Putin hopes will go away with time, as the Western resolve gets depleted. An additional advantage of open transfer of military and other aid to Ukraine is the strong message sent to other authoritarian, aggressive countries around the world no to engage in land grabs, otherwise they will face the collective might of the West. These countries include, but are not limited to, China, Iran and North Korea, all of which have been threatening and/or openly preparing to armed conflict with its neighbors.
There is no such similar advantage in so much additional transparency in transferring weapons to Israel. In fact, there are possible costs to it, as the United States is trying to balance its aid to Israel with the aid to the Palestinian population, and attempts to help contain the conflict. Instead, the US chose to position its forces directly in the Middle East to deter other actors from spreading the conflict with Israel wider.
References:
Secretary Antony Blinken @SecBlinken
I met with an Arab League-OIC delegation from Egypt, Jordan, Qatar, Saudi Arabia, Türkiye, and the Palestinian Authority to discuss efforts to meet Gaza’s humanitarian needs. We discussed our shared goal of establishing a future Palestinian state alongside Israel.
12:16 AM · Dec 9, 2023
Secretary Antony Blinken on X
Secretary Antony Blinken @SecBlinken
Urgently addressing humanitarian needs in Gaza is a shared priority for both the United States and Saudi Arabia. Met with @FaisalbinFarhan to discuss efforts to reinforce regional stability and security, as well as the need to end the devastating conflicts in Yemen and Sudan.
11:47 PM · Dec 8, 2023
Secretary Antony Blinken on X