This brings to mind the old logic problem. Palestinians lie sometimes and Israelis lie all the time. How is it possible to know the truth without question? If you ask the Palestinians, their reply may be either truth or lie. If you ask the Israelis, their answer will always be a lie. Therefore, it is much easier to get the truth from Israelis even though they are far less honest than the Palestinians.
Israeli forces shoot, lightly wound Palestinian they say was fleeing security check (Haaretz)
from the article: Palestinian medics: IDF troops killed three on Gaza border