Israel has reacted. They did not start the conflict by sending IDF planes and rockets into Gaza. They have reacted to the Hamas attack. They have learned to live with occasional rocket attacks from Hamas and Hezbollah. This attack was different. The brutality and depravity shown was not something born out of a war, but out of sheer hatred. Hamas and Iran have a stated goal of the destruction of Israel. Israel does not state the same to it's adversaries. But they do have a policy of revenge on their attackers 10 fold. That does not bode well for the Gaza strip. It is also the only thing the Arab hatred understands.
Israel does not attack any of it's neighbors. They made a peace treaty with Egypt in the Camp David accords in 1979. In 1994 they formally signed a peace treaty with Jordan. They have had no hostilities with either nation since then. Other nations such as Saudi Arabia have been working on the same kinds of peace treaties. I would think that part of the reason is they realize that Israel can transform itself into a war machine within days and some of these countries don't care to be a part of that.
Israel doesn't intentionally attack civilians, but they have acknowledged that collateral damage does happen. They do not pussy foot around. When attacked, they will respond with intensity. As they should. Hamas did not make any effort to attack military structures, they intentionally butchered innocent civilians. This is the way radical Islamists like to operate. Same way they attacked the trade centers on 9/11.
There have been many two state solutions pushed, the Palestinians have rejected all of them. Israelis are open to a two state solution, but not if it gives up any land around Jerusalem. Hamas, Hezbollah, Iran, and the Palestinians continue to push their agenda that says Israel has no right to exist.
Israel is going to take care of business now. This attack was compared to 9/11. They are going to do what they need to do. Maybe it's time for people to understand that compassion and compromise can only go so far. Israel is going to go into Gaza and do what they have to do to destroy Hamas capabilities. Too bad. Don't poke the bear unless you are sure you can take him down. Now the bear is going to take you out.
Get your popcorn.