It's more like "hey, that neighborhood full of families and shopkeepers has some gang members in it. Let's bomb it all." Hamas isn't "bringing in kids". They're resistance fighters who live in the same area, which is roughly the size of Los Angeles. And in the minds of Hamas, they're fighting for those children to have a right to that land in their future. To have a right to grow up free and unoppressed. Those children aren't "shields" and they weren't brought there. They were born there and are now being indiscriminately bombed as an excuse to make Hamas look bad. Where's Mossad? Where's Israeli special forces? Israel likes to talk a big game about their abilities, but in this conflict, "rain missiles from the sky and blame the victims for being in the way" seems to be their only tool.
You realize Israel even bombed evacuation routes, right? Told people "it's safe to leave this way" and then bombed the caravans leaving. You can't even leave without getting bombed, and you think they're just importing children in?