The more thoughtful among them might question the premise of your question, namely that the United States sells Apache helicopters ot Israel so that they can be used to kill Palestinians.
With every strike at your enemies flesh you tear a peice off for yourself, even if you don't want anything from them. I remember a story about warriors and their needed beliefs to overcome the mind of the enemy. They would try to consume them for the knowledge in their eyes and their brain powers. This was well before documented science and modern technology, but the belief made them stronger. The Native warrior is dead against the welthy modern man and the welthy modern man carries the Apache face on their fiercest of warriors to intimidate the weakening natives of another land. Don't let the warrior die for honnor, let him live for it.