No, but the media has shaped the narrative to instruct the public as to what the intent was. If a kid brings a fake gun to school, they'd be arrested too (wrong or right)
So.. in your mind bringing a very small disassembled clock in a custom housing is exactly like bringing a fake gun to school.
Ooookay.
yeah, very small disassembled clock which looks similar to a bomb is same like bringing a fake gun which looks like a gun.
The school and the police didn't over-react. The media simply glossed over what the kid actually did.
Which was nothing illegal, wrong, or even against school rules.
So yes, over-reacting is exactly what they did.
You sound determined to believe this, so best of luck to you!