Whatever Trump will do he won’t talking about and certainly not actually refusing to SELL arms to Israel like Biden and Harris do.
Putting that aside Trump didn’t just decide to drop Ukraine, Firstly Trump was probably right years ago when he said that Ukraine would not be in a war to begin with had they not been talking about joining NATO and that in the absence of any actual conflict moving hostile soldiers closer to a countries borders (like NATO was doing to Russia) is far more likely to cause a war than prevent one. Secondly Zelensky should have had a little more sechel and not ran around campaigning for Democrats in Pennsylvania, told the the The New yorker magazine that JD Vance is too radical etc. and then think that Trump (of all people!) is not going to go after him for it. Israel is unlikely to make the same mistakes.
As an aside the Democrats impeach Trump over a Ukraine phone call but then have the gall to bring Zelensky to essentially campaign for Harris and co in swing state Pennsylvania