[GIANT NSFW] What do we do with evil men?

Let's say hypothetically a terrorist organization, let's call them Hamas, attacks a community they hate, let's say the jews, kill civilians indiscriminately, rape women and then kill them, parade them naked where they live and then spit on their dead bodies. They take hostages and force some women among the hostages into sex slavery. Let's just they follow a extremist version of a repressive 7th century ideology which grants them permission to do all these things during war and let's just hypothetically assume that I know what I am talking about because I have read the book I am talking about.

Well, how do you deal with this? They think their evil has a stamp of approval of God (the one with a big G). What punishment apart from death penalty would you prescribe to these distinguished gentlemen who kill, rape & kill, torture innocent people in the name of God?

How should a country who was attacked deal with these people? I think they know, but I was wondering if we know.

Now, for those who will try to justify these actions by whataboutery, I just want you to know that I don't approve of the disgusting Israeli settlements of Jews in Palestine either. I think they should end it "a few decades ago". But, this was not the reason Hamas attacked Israel. I notice that this isn't the behavior you engage in if you even want military victories. You don't rape women and kill them because the country the woman belongs to has occupied your land (Gaza hasn't been under Israeli control since 2003, btw)