This is a very disheartening statement.
We do know "for sure" that Islamic Jihad had a failed rocket landing on a parking lot close to the hospital. Even Gazan reporters agree on this, and they themselves sent pictures to the rest of the world of the parking lot.
Also, your second statement is trivially verifiable as wrong. They didn't attack the Shifa hospital, and there is a deluge of videos of how the Israelis are helping the hospital while they take out all the armament left behind from Hamas.
This is not hard. There is so much evidence from multiple sources — even anti-Jew sources support the above statements.
I give everyone the benefit of the doubt — so I will assume that you are being incredibly lazy, instead of something nefarious.
Oh look, a pro-Israeli poster goes straight to suggesting anti-semitism!
If you're talking about the hospital parking lot that go struck early on in the war, Israel claims it was hit by a Palestinian rocket, but the NY Times did a pretty thorough analysis of the available video footage and concluded that, whatever hit the parking lot, it was not the rocket Israel claimed it was.
Israel has argued that the Shifa hospital was a major site for Hamas, but the evidence they're put forward so far was pretty limited - Randy's BBC video is a pretty good summary of the issues - they point to a hole near a MRI machine as a tunnel but only show the opening, they point to a few guns as proof it was a stockpile site but the number of guns change before their "unedited" walkthrough (that still has camera cuts) and the later press tour, etc.
If Hamas was operating out of this hospital, I'm sure it'll come out. But IMO you need a pretty high standard of evidence to strike a hospital, so Netanyahu is going to need a strong case here, and if he's arguing this was a major operational center for Hamas, that's going to take more than a dozen or so machine guns to prove. Honestly, the clearest piece of evidence in his support is the one you deny - that it certainly seems like
someone was shooting back at the Israelis when they took the hospital.
On the flip side, security around the opening to what was allegedly an entrance to Hamas' tunnel network seemed, um, a little light, in the video footage, if there was even the remote possibility that Hamas could start pouring through it at a moment's notice.