My children have always gotten that there are diverse views of Christianity. (My oldest child is 14, youngest is 2, and there are two in between.) First of all, I have only been a Christian for less than a year and a half now, and before that I was Pagan for nearly 17 years, and DH is not a Christian. Maybe it's where we live, a very liberal part of a pretty liberal city, and the people we know, but I don't find that Christianity is the dominant worldview around us. What I find is that the non-religious have the loudest voice, and a lot of this is expressed in terms of 'religious tolerance' for all religions except Christianity, and that is justified by throwing around assumptions that Christians are judging everyone around them and teaching their children that everyone else is going to hell (or that Pagans are worshiping the devil, or things of that nature, which btw no Christian I know does). I know this because I used to do the exact same thing, and I fit in quite nicely here in my little corner of the world. I don't feel that I fit in anymore.
The main thing that I see about Jesus, however, is that He either was simply a good "teacher" or did not exist, but certainly not the traditional Christian position on Jesus' divinity. Many self-professed Christians don't even believe in that, or at least think that it doesn't really matter. Again, maybe it's just where I'm from and the people I know, but even in the liberal mainline protestant churches I attended as a kid, this is what I noticed.
This is what it's like where I live too. The non-religious are the largest group, then Christians, most of whom are pretty liberal religiously, then Buddhists who are also liberal in their belief/practice.