Military response and operations to save the hostages is naturally justified, but that can be done without actively

• cutting off water, food and power supply
• bombing hospitals and apartment buildings full of civilians
• executing civilian families in the streets
• allowing members of parliament to call for eradication of the Gazan people without criticism
• trying to shut down any criticism of their extreme and indiscriminate violence by calling their opponents part of Hamas (South Africa, UNRWA)

How would you feel the charge outside the black hole? Electromagnetic interactions are mediated by photons, which are famously unable to escape black holes.

That other countries would do it too does in no way make it morally justified, it just makes those countries monstrous as well.

Hamas are horrible terrorists. There, your first liberal pointing a finger at Hamas. Now, consider what the point of critique is. Will Hamas ever care about western criticism? No. Will Israel ever care? Maybe. They depend on Western support in their political and economic stability. Therefore continued scrutiny and criticism of Israel has a chance of actually making a difference.