What exactly can the entity send to Ukraine that the west itself has not or could not send? Nothing.
By this logic why is any state in NATO sending anything? lol all the small states don't matter right? lol
Israel has loitering munitions capabilites specifically tuned to destroy air defenses with the Harpy and Heron.
Israel has LORA ballisitc missiles(an alternative to ATACMS), Air launched cruise missiles, Air Defense(supply of patriots for example).
Israel has gone so far as to block US exports to Ukraine, that have Israeli made parts.
You fundamentally don't understand shit between Israel and Russia.
Israel's outlook isn't oh US's enemies are my enemies. Israel has in the past courted Russia and China(they sold them Radar tech and drones, and even allegedly gave the Lavi designs that helped the J-10 project).
Go take a look at Putin's inner circle of Siloviki, are are a significant amount of Russian jews, do you think they are all anti zionists or something? lol
Israel has a significant amount of Russian Jews, Putin sees them as assets, not antagonistic opponents to a Anti Zionist cause. Many have also played a role in the Russian State itself.
You know the billionare guy that owned Chelsea? he wasn't no civilian. lol
Israel helped Russia against Georgia where it gave over classified information on drones it sold georgia, in exchange for info on things Russia sold Iran.
There are so many more layers than this, do some reading instead of assuming, of two people don't get along, so they must automatically be friends of their enemies, when geopoltiics are a lot more compartmentalized and complex.