No, they're saying that it's technically possible for an Israeli company to have done this. The article says that an SDK exists, but there is no proof that it's being used in the way they're speculating about. They're Just Asking Questions (TM). But it's possible and mentioning an Israeli company makes certain people paranoid similar to how mentioning Warren Buffet makes certain people paranoid.

It's be relatively simple for security researchers to monitor the traffic from smart TV. But maybe all of the security researchers are working for the Israelis too. Can't prove that they aren't all working for the Israelis. Therefore we should just trust in what is implied by this one article that isn't even showing any network packets from any specific devices.

Just how internet conspiracy theories work. People tend to not question those that are Just Asking Questions so long those implicated in the conspiracy are people they hate.