https://wallhaven.cc/w/g735l7 was remove for inciting violence.
It has nothing to do with violence. There are plenty of youth target practice leagues in the U.S. It's all about the sport of hitting a target, and nothing to do with violence. It's no different from darts or archery. Also, many of these organizations teach safe responsible firearms handling, and some teach conservation. It is a cultural thing that has nothing to do with war or violence.
Sources: https://en.wikipedia.org/wiki/High_school_gun_clubs_and_teams_in_the_United_States https://www.legion.org/shooting https://www.youthshootingsa.com/about-us/ https://4-hshootingsports.org/ https://www.usayess.org/about-us https://congressionalsportsmen.org/policies/state/recreational-shooting-appreciation-programs-in-schools
Added 7 minutes after
Contrast to this thread, where a Nazi sympathizer's works has been preserved. https://wallhaven.cc/forums/thread/3078 https://wallhaven.cc/w/pkqpv3
If that can be left on the site, but not innocent sporting content, then that would be a huge double standard.