And, how is the fact that for every Palestinian terrorist Israel killed 10 civilians Palestine's fault?

Also, Israel didn't "give Gaza control to the Palestinians" in 2005, they only gave them limited self-government power. They still couldn't control their own border, didn't have access to a source of water etc. And none of the people who fled their homes in Israel during the previous wars was allowed to return home, unless they were of Jewish descent.

What we see instead is that Hammas has less and less ability to harm Israel, but Israel is still systematically killing Palestinian civilians - an almost 20:1 ratio is not a sign of a democratic state defending itself from terrorism, by any reasonable measure.