There are likely three reasons for this
1) as said, there is not a majority support for such cuts. Remember picking your battles is important, and the republican party is still cucking to the jew state, if he expects to get the other cuts through, he can't always toss in shit to fuck the jews in the same bin. Otherwise they're going to auto-nix it all and kill the whole thing (its already facing pressure as it is). You start when and where you can, eroding the entire thing piece by piece, eventually you'll have Israel getting its same level of "aid" but that aid will be 10 times the rest of the aid we provide to all other nations combined, at which point people will point that out, then other people will begin asking why we're giving them so much aid still, and there will come public acceptance of cutting the jews shekels off as well
which is also where 2 comes in
2) the jews behind the scenes see the writing on the wall, they realize that that will eventually happen. And they're likely putting pressure on their puppets in congress to fight Trump at every turn, and that pressure would ramp up considerably if he also cut aid to their state. He needs them to be less defensive so he can wear away the foundations around them, so he can get these other important first steps in place. If he goes full reich right now, the jews will go all out against him, no more punches pulled, and then you have mossad agents sneaking into trump tower and kidnapping the first lady and the crown prince, as well as "crazy lone psychos" mysteriously making it all the way into the whitehouse daily as a message to Trump they can get to him still. He doesnt need that pressure.
and finally 3) there are already to many "trump is literally hitler!" tier faggots still running their mouths. If he cut off the jews in the same sweep as the rest, then he just gives them more ammo to throw at him, and right now he doesnt need that. He needs his measures to be reasonable and understandable to republican constituents so that they'll be on board with it and put pressure on their reps to do what the president says and go along with his agenda. If to many of them can be swayed by the hitler meme from the liberals, then he loses his populist appeal and power and can't hammer the cuckservative congress to follow his lead. So, for now, going after the jews is unlikely
Trump knows what hes doing, we've seen this proven time and time and time again. There are reasons for everything. Some might not be apparent immediately or for a good while. But they all make sense and add up perfectly in the end.
Just look at the shit with the first travel ban. I think it was 5 of the 9th circuit judges came out afterwards and said the first ban was in fact lawful/legal, and right after the original ruling they realized how badly they fucked up and went "oh shit, uh, can you please resubmit it so we can rule again?" because they knew how badly they fucked themselves. Instead though, he didnt, EVEN THOUGH he could have gotten it through. No, instead he made it softer and more of a compromise (but which can later be expanded of course) to show he is willing to meet them on common ground. Then he let them hang themselves AGAIN by ruling based on feelings/emotions/"muh hitler" bullshit, but is going to take this one all the way to scotus, but he'll take his time and make sure his scotus pick is in place before it gets that far.
Now why did he do all that? Simple. He wants people angry at jewdges and their bullshit. He wants grounds for impeaching as many of them and removing them from their seats as possible. And he is letting them hang themselves to get that ground. When the case gets to scotus and they're forced to rule on it, and forced to rule in the presidents favor, consider the recent hawaii ruling, it said the president couldnt ban people because essentially "the first amendment applies to non-citizens to," but by getting a scotus ruling in opposition of that, he defacto makes the courts recognize that the constitution doesnt apply to non-citizens, which guess what? That means no more immigration courts accepting ANY illegal aliens cases, because they are no longer given ANY protection by the constitution because of the ruling that will come. Which will vastly speed up deportation processes and remove taco's ability to hamstring the system.
Its all fucking 1488D chess. One move plays into another, with moves going on everywhere at once.