Technically your tax dollars aren’t being used. The US sells arms to israel. We don’t just give them away. So the US is benefiting from this war but not funding it.
The way I understand it is the money is given as grants to israel that have a stipulation that they need to be used to buy US military equipment. Basically it's taxpayer money being used to buy from american companies via a 3rd party. War is a racket. Your taxes go to the MIC, not israel.