Not parent, but my thoughts:

- Decline of religion/spirituality is more pronounced in usa.

- More dual working parent homes (due to free labor markets). I also suspect that while real incomes have risen, actual disposable income has decreased, which pressures households into dual working arrangements. This means less time invested by parents in kids.

- institutional rot of public education . As some poster said, school bureaucracy is now defacto enabler of bullying - by doing nothing when observed... and punishing teachers that actually try.

- the internet has cracked the authority of social groups, with more time spent online and people more fractured among niche interests. This means less oversight and more activities happening without a concerted response by the group

The US is intensely religious compared to much of Europe. Intensely.

Yes but you should compare vs peers.

You want to look at countries with high per capita ownership of firearms.

With the exception of uruguay, most comparable countries [1] place higher importance on religion vs USA [2]

That veing said, there are confounding factors. These surveys are not measuring spirituality, for example.

Then there is the elephant in the room with regards to gdp per capita. I've been told of an old chinese proverb that illustrates this point:

No food. One problem. Much food. Many problems.

[1] https://en.wikipedia.org/wiki/List_of_religious_populations#...

[2] https://en.wikipedia.org/wiki/Estimated_number_of_civilian_g...

I think you are gonna need to specify what countries you think are worth comparing, because there's not really a structured correlation between the lists you link (and among large countries, the US has relatively high religiosity and relatively low atheism, look above and below at your [1]).

> - Decline of religion/spirituality is more pronounced in usa.

vs where?

You haven't even spent 15 seconds looking up basic facts about religion, have you?

It shows.

Are drugs a serious factor in the US? In the case of this shooter, his mother was struggling with drugs, had a fraught relationship with the son and the grandmother was pushing them out. Growing up amongst that would build a lot of anger in someone.