They've already been caught lying...
Even the videos produced so far have raised questions under scrutiny. A BBC analysis found the footage of an IDF spokesperson showing the apparent discovery of a bag containing a gun behind an MRI scanning machine, had been taped hours before the arrival of the journalists to whom he was supposedly showing it.
In a video shown later, the number of guns in the bag had doubled. The IDF claimed its video of what it found at the hospital was unedited, filmed in a single take, but the BBC analysis found it had been edited.
They knew there was a large basement, because they built it...
Israeli forces say they are still carefully exploring the site. The video presentation of al-Shifa did show the main facilities lay deep underground, and it is quite possible the Israeli soldiers have not reached them yet, so there could be much more to come. But the attempt to present what has been found so far as significant is bound to fuel scepticism about whatever is presented later.
There are questions over how much of its graphic presentation of the network under al-Shifa was based on what Israel knew already; its own architect had built an extensive basement area there the last time Israel directly occupied Gaza, up to 2005.
And even if they weren't lying, it's still not enough to get around the Geneva Convention...
All of this is significant under the Geneva conventions, which forbid military operations against hospitals unless “they are used to commit, outside their humanitarian duties, acts harmful to the enemy”. This exception, spelled out in article 19 of the fourth Geneva convention, states specifically: “… the presence of small arms and ammunition taken from such combatants and not yet handed to the proper service, shall not be considered to be acts harmful to the enemy”.
There's no rationale reason to believe any claims made by Netanyahu's government. Time after time they make these outrageous claims, and if they actually try to show evidence it turns out to be at best a misrepresentation, but often outright fabrication