My word? Don't take it. I certainly, at this moment do not have any insight into that particular building.
But it has been shown, time and time and time again, that Hamas, Hezbollah, PLO and all of that ilk use civilian infrastructure to house their military units/equipment/caches etc
It has been shown very frequently by IDF/USAF/RAF etc what has been found out alternatively what was stored there... Essentially if a school literally vaporises after a missle strike, they know it was hiding explosives. In that instance, the lack of evidence is often, ironically, proof of evidence.
Lumping Israel into the same category as Russia speaks of an incomplete grasp of the facts (that is the diplomatic version). At this moment, I have yet to see to Israel conducting any 'Special Military Operation"... Rather they are calling it what it is. A state of war with a terrorist group who is hellbent on it's destruction and obliteration from the map whilst driving all it's inhabitants into the sea.
Last I checked, the Israeli constitution does not call for the wholesale murder of Arabs living in Israel.
In fact, even the sovereign Arab nations are tired of the "Palestinian issue". They have come to understand that the Palestinian leadership (not the civilians) are not interested in a solution and have grown tired of their struggles for power at the expense of the civilian majority.
That is why we have seen so much progress with the Abramhic Accords as they want to move on having reached the conclusion that Israel is here to stay, the world is a better place with Israel in it and they want to be a part of that.