My 4D chess gigabrain explanation for the hospital bombing: Both sides think they're innocent

Think about it:

You're in Islamic Jihad. You shoot off a rocket. Where did it go? How the frick do you know? You're not a djinn with magical powers. You just know it was going the right way when you fired it.

You're an Israeli pilot. You return from your mission and see the news. They ask if there's any possibility you could have made a mistake and bombed the wrong building. Of course not.

It's entirely possible that both sides honestly believe the other side did it but they have no proof so they're lying about each other.

Another possibility is that Israeli extremists did it intentionally because they wanted to frick up any possibility of Biden actually making progress in de-escalating the violence. I consider this fairly remote because there's a lot of people in Israel who would do this, but I doubt there's enough of them in the air force at the same base to pull it off.