Many more Arab Gazans were killed over the years by Israeli Air Force bombs than Israeli civilians killed by Arab rockets. We have such war crimes committed by both sides. But while the "title" of the crime is the same for Israelis and Palestinians, the Palestinians have good mitigating circumstances, which Israel lacks. They had no other choice of even a semi-effective weapon. Therefore, if both sides are put on trial (say, in the Hague in front of an unbiased court), the Palestinians may end up getting a slap on the wrist while Israeli commanders may get a life sentence.
One student killed, three wounded at Arizona campus during fight (a)
from the article: To the leftist who has no problem with rocket fire on Israel