The reasons the causalities are higher for the pals is that they are not able to kill as many people as they would like and they hide behind civilians. IDF targets terrorists, Hamas hides behind civilians, Hamas targets civilians.
And the reason gaza is under blockade is because they have previously used all their resources for terrorism.
And if you go back you can see that the genesis of this conflict.is explicit - that these are Islamic fascist who against any non Muslim state of any dimensions and will fight it to the death. Jews are the natives of the land , for hundreds of years there were laws against Jews in Israel as well as every other Muslim country. When Jews immigrated in the 20th century they did not displace anyone and infact their development caused many migrants to move to the land. The intolerant Muslims were against any Jews in the land and they went to war over there existence and that when they were displaced. Imagine being so bigoted that you go to war against the natives of the land, who do you think built Jerusalem or Hebron or Nazareth ?