Let's say 1 dollar is symbolic of a larger amount but I am using small numbers to make this easier
If you have a 10 dollar budget and 8 dollars go to Israel that only leaves 2 dollars left over for everything else
If you gave 0 dollars to Israel that would multiply your budget for other things by 5
Fighting on the wrong side of world war 2 led to all other wars since then
This led to massive welfare for the military, importation of immigrants that cost massive money and so on
If we thought against the Soviet Union in WW2 instead of against Germany we could afford to house all the people who were descendants of the Americans who were legally living in America prior to WW2 and to provide for all their food and health care whether through the so called free market or through government programs because either that money would not have to be taxed away to pay for the consequences of fighting on the wrong side in World War 2 or the tax could be used for these programs