I assume kids of that age would make the same leap and think that people who eat meat are bad people...
Well, they are
.
Moll, I am in the position that you inquire about.
My wife is not vegan or vegetarian, although she now eats a predominantly vegan diet (no dairy or eggs, little meat and fish) for health reasons.
When our kids were born, I was a happy-go-lucky vegetarian and was happy if I could get my vegetarian food, and cared little about what others ate. When I found out about eggs and dairy, however, a few years after our kids were born, I went vegan and at that point it also became more important to me what other people eat.
So my kids were raised to eat meat, fish, eggs and dairy. Of course, they asked me why I do not eat that, and I was always careful to provide a diplomatic answer. I used books like Ruby Roth's "And that is why we don't animals" to illustrate my point (although that was hard on the border I guess).
At some point in time, my wife - due to health reasons - stopped to eat eggs and dairy (for hormone content) and greatly limited her intake of meat. At that time, she also began to realize that it would be better if our kids ate less animal products, alas, they were used to them at that point in time.
The result is that today, of my two kids, my older son (12) loves meat and fish and often complains why he can not live in a "normal" family where there's meat on the table every day. My younger son (11) decided himself when he was 9 that he does not want to eat meat any more. I hope that he sticks with that, even if the rest of the world wants to tempt him to eat meat