Plenty of open land for Hamas to operate in.Hamas is stuck in one of the most densely populated areas on the planet, under constant surveillance and intrusion by Israelis and are living in what is recognized as 'the world's largest open air prison'.
Where did you think they would go?
Can't go close to the borders, where 25% of Gaza's arable land is a 'shoot to kill' zone, can they?
By the way, the only one defending terrorism here is you, where you are still defending bombing schools and hospitals filled with what you call 'cockroaches'.
https://www.google.ca/maps/@31.4159835,34.4581697,42987m/data=!3m1!1e3
And your whole line of argument is a joke. You are saying that Hamas can't launch terror attacks from open land because if they do Israel will stop them. Sure sounds like a win-win to me. The Palestinians get rid of the massively corrupt terrorists who are preventing peace from occurring and the Israelis aren't subject to terror attacks.
If they launched their terror attacks from open land they would only be committing crimes against humanity once with Israelis as the victims. Since they hide in Gaza's population centers they also commit crimes against humanity with Palestinians being the victims.
But you just want to make excuses for Hamas terror instead of even hinting at criticism.