Call it knee-jerk panic or an abundance of caution.
Diogenes of Sinope: "It is not that I am mad, it is only that my head is different from yours."
Arnold Judas Rimmer, BSC, SSC: "Better dead than smeg."
Unless he was waving it around in a threatening manner, then it's just stupid knee-jerk panic.
"Given the culture we are in now" police thought it was better to start with a massive response and scale back if needed, he said.
"In this time and age, people get concerned."
You, sir, are in league with the terrorists and are a traitor to your country.
"ATTENTION: Customers browsing porn must hold magazines with both hands at all times!"
“Activism is a way for useless people to feel important, even if the consequences of their activism are counterproductive for those they claim to be helping and damaging to the fabric of society as a whole.” - Dr Thomas Sowell
That's a good point. At my kid's school's safety briefing, they said experts had determined that in school shootings those who run live, and those who try to hide get shot.
"Be bold, and mighty forces will come to your aid."