Children tend to adopt the values, beliefs and behaviors of those they spend the most time with.
See #4, #5, #6, #8... you get the idea. We choose to surround our kids, for the most part, with people who share our values and beliefs. We don't live in a bubble. We don't isolate ourselves from everyone who isn't 'like-minded'. But we choose who will be the primary influencers of our kids.
That's our job.