The implication is probably pointing to Kushner's alleged habit of talking to foreign contacts on the app, speaking officially, rather than his use on its own:

https://www.theguardian.com/us-news/2019/mar/21/jared-kushne...

Whether their conclusion is accurate though is dubious.

There’s a direct relationship between Jared Kushner and the current administration giving Israel freedom to do as they please.

There’s no planet on which the DOJ pursue legal action against an Israeli state sponsored actor like NSO.

NSO existed during the previous administration. What does Kushner have to do with anything? He's an American, not an Israeli.

I can’t tell if this is a joke or not. He was put in charge of Middle East relations. He spearheaded moving our embassy to Jerusalem.

As for NSO being founded during a different administration: jamaal Kashoggi wasn’t assassinated during that administrations time in power.

No. Why would you think that?