The person you're replying to said nothing about believing it, that's an inference you've made. Cos they have made a good point, listening to one side only does cause an echo chamber effect. And I encourage everyone to read as much as they can from all aspects in matters like this, but draw your own conclusions. War isn't simple, it's complex, dirty, and downright deplorable. It's why so much study into past wars is undertaken, even those in recent memory that were well documented compared to ones that happened long ago. A lot can be learnt, be it statistically, economically, culturally etc.
As an addendum, if you only hear two sides to a story, the truth is usually somewhere in the middle and usually nothing like what people actually had to experience.
Honestly, what I see is much worse. Hamas stated they were going to use human shields and Israel hasn't given a fuck. War doesn't get any more sobering than that, to be honest.
I listen to a metric fuck ton of propaganda and it takes a ton of work to sort through it all. (I am using the term "propaganda" in the context of strong bias, not necessarily misinformation.) One thing I can say, is that the second you get emotional about news from sources like this, you are becoming vulnerable to actual misinformation. Information warfare is real and just as dangerous as bullets, in some ways.
Like I implied before, the actual truth to a story about war is probably much worse than people may think.
if you only hear two sides to a story, the truth is usually somewhere in the middle
That's a fallacy, sometimes one or the other side is straight up wrong or lying and the other isn't. Probably not this time, but regardless it's important to keep in mind.
There is an underground city in Gaza. Terrorists hide there. It would be strange under the circumstances for there not to be tunnels leading to/from the hospital. The IDF's claim is most likely true.
The "other side" of the argument is not a rejection of this, it is to point out that these circumstances were manufactured by apartheid, and that they do not justify Israel's ethnic cleansing campaign