Statements from Hamas like they are reputable? Fox is way, way more reputable. Stop posting this propaganda from a group whose stated goal is the elimination of all Israelis.

Nothing justifies this slaughter

Of the dead were terrorists.

That's a civilian target. I'll await the IDF's justification for bombing it.

At least 50 killed in Israeli airstrikes on al-Fakhoora school in Gaza's Jabalia refugee camp

Terrorists it is a legitimate target.

It does not establish that Hamas fighters controlled that building or were even present there.

Here, the IDF is a military well versed in the laws of war. Much of that military was in the lead in opposition to Netanyahu for the past year. Their officers were not turned into genocidal robots overnight. If the IDF bombed a specific building, it was because they had intelligence that the building was a legitimate target.
The claims about genocide that get posted here are nonsense.

Or is it "anything goes" in gaza?

lot more than 12000 dead.
I defer to the IDF's judgment. I have no idea how many dead children. I don't even know what the definition of 'child' is in this context. Anyone under 18? In my personal experience teenagers are more than capable of firing a gun.

The specific intelligence the IDF was acting on and the specific intent of the officers making the decisions.
And even if a mistake was made or the judgement was wrong doesn't mean it's a war crime.