How Will I Explain Extremist Buddhism to My Children?

I'm Buddhist. My husband is Catholic. Our religious differences created some tension early in our marriage — mostly because I fretted about our future children's religious upbringing. We're not terribly religious, but both of us derive a sense of community, culture, and morality from religion, and we wanted to expose our children to both of our faiths.

I worried they would become Catholic by default, due to the prevalence of Christian traditions and holidays in American culture. Christianity is the religious background of over two-thirds of Americans. By contrast, less than 1% of our population is Buddhist, and many fewer still are Theravada Buddhists.