As I'm sure you know, because someone is kind enough to point this out every time somebody makes this moronic point, most of the people in Gaza weren't alive when Hamas came to power. So no, they didn't vote for them. And haven't been allowed to vote since 2006.
And as I explain in the article, I'm sure some of the slaves celebrated the actions of Nat Turner on August 21st. And while what Turner did was unconscionable, unless your brain and humanity is considerably lacking, you can understand why they didn't condemn his actions.