Sheldon Adelson's backing helped Netanyahu a lot, and not just by funding the free Israel Hayom newspaper (which generally assumes a right-wing, pro-Netanyahu editorial stance).
Coincidences are funny sometimes :-)
My point is a simple one: the company was hired by someone. Was it the opposition party? To say this is entirely Israel's doing implies the Slovenian party that benefits just happens to have gotten lucky. The reality is likely considerably murkier than that.
Noone is saying that the party that contracted this company (if indeed it was a Slovenian party and not the Israeli state itself) for this service doesn't carry blame. But both the company itself and the state of Israel carry just as much blame for offering, permitting, and carrying out such services.
By your logic, if someone were to found a legal private paid assassin company in France, and then the opposition party in Germany hired this company to assassinate the German chancellor, you'd say that it's unfair for Germany to blame France for this.
Or more simply that what the Israeli company did, is not illegal in Israel.
Selective prosecution is a recurring issue under Israeli jurisprudence.
Curious: can you show the research steps you took to reach this conclusion? Really curious how we can all easily determine which companies are and aren't CIA fronts!