The one time the UN looked in detail into this theory, it turned out it was crap. Hamas and civilians are sometimes next to each other just because they all live in Palestine, but the claimed thing where they would deliberately gather up some civilians and have them stand next to their installation, as if this would deter the Israelis or as if there was any shortage of non-artificial civilian casualties and so it was useful on any level to create some artificially, was it turned out a bunch of hooey.