Israel has been holding on to a trove of information about UNRWA staffers' complicity in the Oct. 7 attack activity but has so far refrained from publishing it for political reasons, Israel Hayom has learned. Follow Israel Hayom on Facebook, Twitter, and Instagram According to three officials well-versed on the matter, Israel had long been privy to the information that led to the Palestinian relief agency's dismissal of 12 employees for particip…