“Why do Americans fish with a gun?”/“So they get the whole school.”

A riddle about the term “school of fish” and school shootings was posted on Reddit—Jokes on March 29, 2023:
       
Q: Why do Americans fish with a gun?
A: So they get the whole school.
     
       
Wikipedia: Shoaling and schooling
In biology, any group of fish that stay together for social reasons are shoaling, and if the group is swimming in the same direction in a coordinated manner, they are schooling. In common usage, the terms are sometimes used rather loosely. About one quarter of fish species shoal all their lives, and about one half shoal for part of their lives.
 
Reddit—Jokes
Posted by u/GhostlyRuse March 29, 2023
Why do Americans fish with a gun?
So they get the whole school.
 
Twitter
JokesBot
@RedditJokesBot
Why do Americans fish with a gun? So they get the whole school.
1:08 PM · Mar 29, 2023
 
Twitter
Imtiaz Mahmood
@ImtiazMadmood
Why do Americans fish with a gun?
So they get the whole school.
2:33 PM · Mar 29, 2023
 
Twitter
D. Rey
@ITDANREYN
#JokeoftheDay
Why do Americans fish with a gun?
So they get the whole school.
#GunsOverPeople
#nraisaterroristorganization
#RepublicansAreTheProblem
3:43 PM · Mar 29, 2023