I guess the heart of the issue is whether Buddhism views types of social activism (such as promoting vegetarianism or other social issues) as meaningful or as pointless. In the Pali Canon, teaching the Dharma is called a virtue. I guess my thinking was that trying to get people to care about the suffering of animals is part of teaching the Dharma, and therefore something important.
I don't believe that there are any actions that are pointless, all actions produce results. Because all things do not exist truly and are dependent, positive actions produce positive results and negative actions produce negative results - all actions matter.
These people who teach their children to kill, I don't think that anyone really delights in wickedness. No one delights in something that they believe in their heart of hearts is wrong. These kind of people really see no harm in killing, and think that those of us that do are just over sensitive, immature and silly. When someone is under the influence of delusions, and is acting on mental afflictions, ignorance is at play, people are not wicked or evil by nature. Their harmful actions plant seeds for further sufferings, so those harming are in need of our help and compassion.
To be effective we need to check out our own beliefs and assumptions. For example, children are not always sweet, some kids enjoy harming insects and animals from an early age.
Wealth in itself does not lead to ignorance, ignorance with its attendent grasping and aversion leads to more ignorance. Wealth can be used to help animals in shelters and people who are hungry, it can support dharma centers. It depends on what a particular individual does with it.
Because we are not awake and all wise and knowing and can't see with an omniscient mind exactly what kind of action or teaching will help someone else, and suit their particular disposition, checking our assumptions and looking at what we bring to everything is important. Working with our own delusions and mental afflictions all the time time on the path, is essential. If we don't then we will bring our own ignorance and nonsense to everything that we encounter and just make matters worse, getting tangled in the eight worldly dharmas. People could even end up with a strong aversion toward the Dharma. That would be awful. Knowing that our own ignorance and aversion will cloud our judgment and that our attachment will stop us from being effective, keeps us mindful and on track.