"[Kushner] is doing US government diplomatic business over a foreign government's communication system." - highconcept

Kushner was doing nothing of the sort. He wasn't a US government employee or a member of a US administration when he held those discussions. He couldn't do US government business even if he wanted to. That's an indisputable fact, not an alternative reality.

What fits my view is that Trump's enemies are clearly willing to lie in order to discredit him. When it comes to the truth, you're no better than he is.