I am fully aware of the IHRA definition and I don’t agree it covers this case.
”Making mendacious, dehumanizing, demonizing, or stereotypical allegations about Jews as such or the power of Jews as collective — such as, especially but not exclusively, the myth about a world Jewish conspiracy or of Jews controlling the media, economy, government or other societal institutions”
The IHRA section you referenced is regarding a particular kind of “conspiracy” accusation levelled at Jewish people - the “global secret Jewish power” trope which is clearly antisemitic.
In this case there is no allegation of a secret conspiracy run by “the Jews” such as the IHRA defines, rather one (albeit baseless and crass one) which claims the government of Israel allowed an attack to proceed in order to create a pretext for justifying invading Gaza. I’m sorry, but while his words were incredibly insensitive and stupid, it was a terribly misjudged attack on the Israeli government / security forces and not on Jewish people.