The Israeli defense ministry has to approve sales contracts. I'm assuming they'd like to avoid spying on citizens of states they depend on militarily/politically or that have the capability of retaliating.
It's an open secret that Israel has been conducting economic and military espionage against the US[0][1][2] and stealing civilian and military technology for decades. This "blocking +1 numbers" is rather a thin veneer to prevent third parties from endangering the "official" Israeli espionage program.
[0] https://www.businessinsider.com/israeli-spying-on-us-has-rea...
[1] https://www.politico.com/story/2019/09/12/israel-white-house...
[2] https://www.nytimes.com/2020/12/30/world/middleeast/jonathan...
It's almost certainly closer to the former than to the latter.
Not that anyone sane would be likely to consider actual war over something like this, but while the French military may not be the force it once was it's still formidable and they are - theoretical willingness to engage notwithstanding - one of the declared nuclear powers.