Yes, they did. When Germans were held as POWs, under the control of the Allies, the Allies had the responsibility to feed and house them.

The Palestinians are completely occupied by the Israelis. Under International Law that didn't exist in WWII, Israel has the responsibility to take care of the Palestinians. The Isrealis are not doing that.

Even before all this latest round of horrible violence, the Israelis have been building on occupied territory, which is another violation of international law.

This doesn't make Hamas the "good guys" but what you are calling for is clearly illegal, at best ethnic cleansing and at worst genocide.