Well, we now know that those yeshivah boys who were murdered actually gave their lives for klal yisrael. they saved the Jews from a horrible terrorist plot that was supposed to happen Rosh Hashanah, Hashem yirachem.
These are the mysterious ways of Hashem that we cannot fathom.
Bu as Jews we know not to ask why. Jews dont ask why. We ask instead "what is the message inside this event? what should we learn? what is the purpose?"
And even when we cannot understand we accept with faith. all Jews are believers, the descendants of believers. This is our Jewish DNA!