Earlier quoted context omitted.
Every country spies on everyone else, including allies. But the extent and depth of Israeli spying in the U.S. is considered to be particularly extreme for allies. Importantly, there are rarely any repercussions, and Israel never cops to it, which is sort of a slap in the face. When it was discovered that the U.S. was tapping Angela Merkel's cellphone there was public outrage in Germany, shock in the international co…
Regardless of the attempt here at painting a country's foreign policy as partisan, any given country favors one U.S. party over the other. Right now, China probably favors a Democrat led government, so does Iran. The U.S. probably favors one Israeli party over the other. Your entire issue with this is likely because you perceive Israeli spying to oppose your political party. On those lines, would you classify Chinese…
2004: https://www.latimes.com/archives/la-xpm-2004-sep-03-na-spypr...
2008: https://www.theamericanconservative.com/articles/the-spy-who...
Notice the thread: Israel is uniquely aggressive, especially as an ally.
This article is full of innuendo and conjecture (they say this up front), but provides insight into the complex web of business and intelligence relationships that make it easy for Israel to accomplish electronic surveillance in the U.S.: https://www.wired.com/2012/04/shady-companies-nsa/
A specific case of spying intended to undermine U.S. policymaking: https://en.wikipedia.org/wiki/Lawrence_Franklin_espionage_sc...
And the same thing 10 years later, except now patently partisan: https://theintercept.com/2015/03/25/netanyahus-spying-denial...
Another thread: Allies typically spy on each other to understand their motivations and to predict their next moves. But Israel is increasingly doing it to enable them to directly interfere in domestic American politics. Some might excuse it as Israel being justifiably paranoid about Iran; others won't excuse it. But you can't deny that it stands apart.
The reported examples are just the tip of the iceberg. As people readily report, it's widely known/believed that the above is just the tip of the iceberg. Sometimes this results in misleading and false accusations, but this is a consequence of consistent, significant, long-term espionage activity, as well as the fact that their intelligence activities run the gambit of methodologies (legal and illegal), much of which doesn't fit the Hollywood definition of espionage.