The article doesn't differentiate between firing at perceived thread and hitting some party-goers and opening fire at the party-goers en mass, and them being killed only by IDF and not at all by Hamas. As much as I can easily believe IDF killed at least some this reeks of propaganda.
TheGrayZone.com according to Wikipedia:
The website, initially founded as The Grayzone Project, was affiliated with AlterNet before becoming independent in early 2018. It is known for its critical coverage of the US and its foreign policy, misleading reporting, and sympathetic coverage of authoritarian regimes The Grayzone has downplayed or denied the Chinese government's human rights abuses against Uyghurs, published conspiracy theories about Venezuela, Xinjiang, Syria, and other regions, and published pro-Russian propaganda during the Russian invasion of Ukraine.
https://en.m.wikipedia.org/wiki/The_Grayzone
