"The shedding of blood (SHEFIKHUT DAMIM) is the primevil sin (GEN. 4.8) and throughout the centuries ranks in Jewish Law as the GREATEST MOST REPREHENSIBLE OF ALL OFFENSES."
Also though Jews are allowed to embark on a military operation to kill terrorists who reside among civilians when they KNOW civilians will be killed in the process.
Take your pick. Choose one.
