It's because it isn't the Israeli government/Israeli intelligence who's doing this (even if many or most of the operatives are ex-intelligence): it's people in private industry. It's plausible some aspects of the Israeli government also have a hand in this stuff, but I think it's explainable without that as well.
NSO Group, the firm mentioned in this and other articles, and firms like Black Cube (hired by Harvey Weinstein to spy on accusers) seem to be effectively running an intelligence-agency-as-a-service model. They'll deploy agents and compromise devices to discredit any potential witness, gather reconnaissance on potential stories that are being written, spread disinformation, influence policy, etc. All you have to do is give them money.
As for the motive: no idea. But this seems to be a popular tactic for discrediting people, especially recently after some people accused NSO Group of helping spy on Jamal Khashoggi (edit: and there's also at least one lawsuit). Tarring their accusers as anti-Semites is one way of dealing with bad PR. I don't know what the parent poster may have done or what their situation might be, but they or their employer may be in competition, or a feud, with some resourceful Israeli companies or individuals.
that's what I was trying to say, boldly discrediting people seems outside the spying field. I defined it as 'stealth information acquisition'. Not political con artistry.
