I've said that "targeting" Hamas also means you are targeting children when you know they are in the same targeted area.
Think of it like chemotherapy. What does chemotherapy do? It kills fast-growing cells rapidly, right? It is effective at targeting cancer cells because cancer cells are fast-growing. However, chemo also kills good cells with it. When you airstrike (use chemo) and it's killing more good cells (civilians) than cancer cells (Hamas), you are more than likely getting "systemic chemo" (indiscriminate) than "regional chemo" (discriminate). I am opposed to systemic chemo and in favor of regional chemo.
I don't really like the chemo analogy very much, it's not considering the personal choices that are made by Hamas, et al.
I think that it's more akin to a terrorist, holding hostages, while threatening to blow up a building that's populated by even many more people. Sooner or later the law enforcement people are going to have to make a decision to go after the terrorists and risk hostage casualties, in order to save the many more and the building.
Anyway, I know that you have been asked this before... and many others besides you.
How would you "target" Hamas?