$250 million line of credit is chump change to Trump
The Kushner family has a long relationship with Soros, not the Trump family.
Trump is battling everything Soros stands for. So what if Trump hasn't called him out by name.
Soros is the richest man in the world. Do you really want to antagonize him any more than you have to. You don't antagonize a Tiger. You kill the Tiger or you leave it alone.
The one China policy stops short of the One China principle that Beijing wants. Given that it's been US policy since 1972, it's not a policy that Trump needs to change in his first month in office.