They have it in writing (leaked months ago) that some ridiculous number like over 1000 Palestinian civilian casualties were acceptable if they got to kill a terrorist.
Also, anyone in colors or in proximity to Hamas members or known gathering areas in the last 2 years, is automatically labeled a terrorist by Israel
Basically they pretend to have a formula to regulate civilian casualties but they have twisted its variables so far that any scenario can be solved by bombing no matter the collateral damage