Was the Las Vegas Attack an Act of Terrorism?
The fact is, we don't know if this was an act of terrorism or not. Terrorism isn't just an act which causes people to be terrorized or in a state of panic. Terrorism is a violent act motivated by a political ideology. Terrorism is intended to force a political position upon a population.
Eventually we will find out what motivated this guy. It may have been terrorism and it may have been simply an act of violence by someone who was mentally unstable.