I think the science is clear that spanking does more harm than good. But that doesn't mean children don't need guidance and discipline. Sweden outlawed spanking in the 1970's and they set up a hotline for parents needing guidance on what to do when their kids were acting up. I think parents just need more support for how to influence and discipline their kids, especially those of us who didn't grow up with good role models.

Mass shootings increased largely in the 70s - 80s in the U.S.

What i see as changed is the easy availability of assault rifles.

I completely agree, well said.

We've definitely gone too far the wrong way. l grew up in the 50s, and my head would have exploded if l acted like kids do now. We could be spanked at school. If a neighbor caught us doing something wrong, they could spank us, and whe our parents heard about it, there would likely be another one. The authorities weren't called, everything was dealt with on the spot, and it was over. Kids have nothing expected of them now, few do any chores, and most feel entitled to whatever they want.

The kids who scream at their parents aren't the ones who end up shooting up schools. The kids who shoot up schools are quiet and overlooked. Shouty, defiant kids don't get overlooked.

I see your point; I don't think the connection is there. I think its more about alienation than entitlement.

Other changes since the '50s:
Most kids had at least one parent at home.
Parents actually spent time with kids.
Kids could get into fights on occasion without the police getting involved.
I don't think protecting kids from abuse caused this problem, I think it's absent or inattentive parents.

Too many Millennials today feel entitled.

[inc.com]

I'm sure that's definitely a factor.