It's true. Of course, the IDF claims it was an "accident." Just like the "missile" Hamas (allegedly) used to hit the hospital (which is still standing, apparently) had loudspeakers to make it sound like a JDAM.
Here's the sauce:
https://www.informationliberation.com/?id=64065
So far, I've only found a single news site in the West that will talk about the rabbis and Jewish settlers who occupied that mosque in Northern Gaza, with the support of the IDF and started this whole mess.