The bombs on London, Dresden, Tokyo, Nagasaki, Hiroshima, Ahmburg, Rotterdam were of course war crimes. Today the world does not accept killing random civilians anymore. In the new world civilians are protected people. There is nothing old about those rules. If for example Bombing UN compounds, random shooting rockets into villages, shooting woman and children point blank, prefenting helping wounded, killing Fatah members, hiding behind civilians is ok and does not need to be investigated your moral compass needs recallibrating.
Second rocket fired from Gaza explodes inside Strip (Haaretz)
from the article: Solana to Haaretz: New rules of war needed for age of terror