USA is a very pro Israel county and the further right you get the more pro-israel you get.
Once both Democrats and Republicans are right wing parties it’s not news to anyone that they support Israel.
Edit: If you are pro-palestine, I suggest you vote as far left as you can (which at the moment realistically only is Democrats) and contact your congressman/women to let them know what your views on these issues are.
I agree that Palestine is an important issue, do you have any suggestions on how to improve the situation?