Really? Back in 1959 my Brother was in a Gun Club at his High School. We lived on Long Island at the time.
He carried his .22 Bolt Action Rifle to School twice a week.
They had an inside Gun Range. I think it was in the Gymnasium Basement.
Nobody batted and eye when he was walking down the Street toward School carrying his Rifle Case.
Yep, times were different then.
I recall Justice Scalia telling about his youth, and he was in a shooting class. He carried his weapon on the New York subway.
Many things have changed over the decades. Some for the better but some definitely for the worse.