Hamas was voted into power in a free and fair election. But I suppose that wasn't by people who are "reasonable free thinkers." What were the people of Gaza thinking!? They should be happy with their benevolent Israeli overlords who control their borders, deny them food and medical supplies, subject them to the worst humiliation in clear opposition of international law, and essentially contain them in "the world's largest prison." I guess we only support democracy when the results are to our liking.
It would be funny if it wasn't so serious that you bring up war crimes. I cannot speak to whether Hamas' attacks are war crimes, but it's a fact that Israel constantly commits war crimes. If we should punish a country that commits war crimes by bombing them, then Israel would be dust. Their continued occupation of territories acquired by conquest, torture, denial of food and medical supplies, and other violations of international and human rights laws should be enough for the international community to invade Israel according to your logic.
And I think I would take you up on your bet. After Hamas was voted into power, Israel tightened its grip on Gaza starting the world's largest siege in an effort to cause the people to stop supporting Hamas. It is having the opposite of your desired effect. I'm not saying that Israel cannot bomb Gaza into submission, but it doesn't mean the people of Gaza will stop fighting for their own deserved sovereignty.