By "they elected Hamas" you mean maybe 15% of the current population? That's a broad brush you're wielding.
(Based on 70% of the population of Gaza being under 30 years old, meaning they'd have been 13 or under in 2006, when the last election was held. And Hamas got ~45% of the popular vote in the 2006 election.)
This is sarcasm, he's just using random words commonly used to justify this massacre. With the addition of "China" and "Qatar state news". Which some very intelligent folk here use to dismiss videos proving that the IDF doesn't consist of human beings.
It is up to the population of Palestine to remove Hamas and barring that it becomes the responsibility of Israel to do so. This is the realities of a terrorist group that has no interest in improving the lives of their people, will use their people as human shields resulting in massive deaths, and has a open agenda of complete destruction and death to all Jews in Israel. There is no compromise or ambiguity in that policy. But ya, Israel is at fault.