Roberts is a Mason, Trump is not
Roberts is trying to do the masonic handshake TO Trump, and you can see in his expression that because Trump is not reciprocating properly, there is a look of extreme concern on Robert's face.
Do not forget the graphic Q has posted…
If Trump is doing this shake TO Roberts, it likely means "Here is your own faggot code. I know it. I know everything. And you're all fucked."
Because the initial claim of Trump giving the "executioner" handshake to Roberts would actually explain Robert's concerned look. He would know Trump isn't in the club, but knows all the codes…