But that'd already entail control over the whole Signal AWS in- and egress as well as any VPN you may be using and/or your local ISP. And then you still have to prove the actual link to the natural person. At that point we're speaking of a threat level assuming the US DoD as adversary. While not impossible, I think if you're willing to pick that kind of fight, you're clever enough not to rely on Signal (or most digital communication).
Signal is not WhatsApp, there aren't a lot of data points linking your communications to end points in the same way Meta does link them.
While this meme/picture is definitely exaggerated, the expansion of Israel far beyond its current borders is a political position held by members of the current government. It originates from early Zionist militias that aspired to capture these widespread borders.
It even caused an international incident some time ago. https://www.timesofisrael.com/israel-seeks-to-calm-waters-with-jordan-after-racist-extremist-speech-by-smotrich/