It's a tough call because it seems this particular individual is not the only person fitting this profile the FBI has spoken to in recent months. You may be able to squirrel one person out of the country or post them up for a couple months in your consulate, but what about the other two dozen? Unlike China, when a spy network collapses the U.S. can't just quietly execute everyone, all these people will be headed to court on visa fraud charges and probably convicted. Gonna be seeing things like this very often for the foreseeable future:

https://www.justice.gov/opa/pr/researchers-charged-visa-fraud-after-lying-about-their-work-china-s-people-s-liberation-army

As far as a "flashpoint", I guess it's like trying to pick one specific star out of the night sky. There are ten other things at least as serious going on right now.