Neither of them are normal, but they're not the same thing. The allegation is that BamBrogan was the target in the noose incident, and there is some security footage which seems to corroborate it. In the axe incident BamBrogan allegedly took the axe to the office wall. That's pretty crazy but so far nobody has claimed he was trying to intimidate somebody else. In this case it's maybe interesting to note that it wasn't just any axe, but rather "The CEO [BamBrogan] had built the axe at Jeff Bezos’ MARS conference this past spring." [1]

The guy definitely seems flamboyant, but that's not the same as unstable. I mean he might be unstable too, but I don't think one can draw that conclusion from the reporting.

[1] https://www.theverge.com/2018/12/14/18128848/hyperloop-arriv...