What a crock of crap! I’m a geezer and a game player and I know any number of young people who also play these games. Not a one comes even close to having any of those tendencies.
Before video games it was playing cowboys and indians or playing army, every chance we had. Watching the 50s documentaries on TV about WWII, the shoot em up westerns which were all fantasy, comic books with the Bop, Biff, Pow as well as comics that again portrayed military heroes in WWII. Pastimes like vacant lot football, no holds barred, or boxing at the Y were also big.
That didn’t make our generation any more violent than any other. They can take their agenda based studies and stuff it.
There was no violence previous to Pong.