If you cared to look up trivial facts, you would know that Gaza blockade started as a response to prolonged rocket fire from Gaza on Israeli civilian population. It may be an ineffective and/or inappropriate response, but it is a response to rocket fire, not the cause of it. You don't have to guess what the goal of rocket fire from Gaza is, because Hamas states the goal openly: "liberation of all the Palestine", i.e. destruction of Israel.
Donald Trump: Israeli settlement construction in West Bank should 'keep going' (Haaretz)
from the article: Gaza border towns demand full state funding of anti-rocket system