It’s a power projection thing- it’s called “steeple-ing.” It goes with the long tie, the pump and shoulder squeeze on a handshake, etc. He probably learned to do that kind of thing so early on in his career that it is completely subconscious. Let’s not make ourselves look silly by assuming every little thing is an intentional display of evil symbolism. No different than so many comments on here where people get accused of making devil horns when they are obviously doing sign language for “I love you.“ That kind of thing makes us look like exactly what the enemy wants us to look like.