There's now a small chance that the next shooting is some singularity-craving bazinga with a greeble-laden AR-15 that believes they can't get domed by the Secret Service because they believe in "quantum immortality" and will immediately teleport to a reality where they weren't domed by the Secret Service. 
Non-jokingly he might start talking about how "based" Leopold was.
Absolutely zero chance Elon has any historical awareness beyond, "Napoleon and Caeser were alpha chad great men".