Once they blockade you and keep you virtual prisoners than the other side will retaliate More so when you realize that America will turn blind eye to every illegal thing Israel will do. Imagine if this was being done by Iran to another country, the champion of human rights would have been in UN crying crocodile tears and getting its army ready to invade Iran. Hypocrisy at its best.
Another thing is that amazingly that even after 5000 rockets have been launched by Hamas as per your figures less than 10 Israelis have died. What are they launching, fire crackers. Propaganda at its worst to justify the massacre of innocent Palestinians.