You are forgetting that Israel [tries to] destroys the launcher and the attacker after every launch. So every rocket attack is basically a suicide attack.

I think that's the main cause of most of the civilian death - Israel doesn't have time to check for civilians in the area, they counter attack almost instantly.

So they'll launch a bunch while they can before they die.

I don't think you can really comprehend the level of hate going on there that would make someone suicide and take civilians with him for even a tiny chance of killing an Israeli.