So now I'm going to throw out my own take on this whole debate, and probably make both sides angry with me.
I seriously dislike cliques. They are inevitable, since man's closest relatives, the apes, are troop animals. This means that they live within and identify with a troop of individuals. Any that aren't in their particular troop are outsiders and suspect, or are outright enemies.
Because of this evolutionary background people gravitate toward, and feel most comfortable within, a certain group. In Blade's case, that is the group of non-parents. It is natural to attempt to elevate your own group at the expense of other groups. This is why some individuals always get excessive in their denigration of other groups. You can pick any particular group you like, look it up on the web, and you'll find someone within the group being rude and nasty putting down some other group.
For me, I much prefer being inclusive. My wife never wanted, and so never had any kids. She helped me raise my kids from a previous marriage though. I've got a number of friends within my circle that never had kids. They get along just fine with all of our other friends that do have kids. Of course, none of them are militant child-free types either, as kids are almost always involved in group activities among our friends.
Unfortunately, many of today's "leaders" have discovered what every petty dictator throughout history has known. This is that people are much more compliant and easily led if you give them an enemy. If a leader can mark another group as "the enemy", then they can focus their group on that enemy, and the group will tend to ignore other problems and issues. This is why politics and religion today is so devisive, with lots of nasty rhetoric and finger pointing. So much of this is going on today that it is becoming common-place, and being devisive and exclusive is becoming more and more normal in our society.
This is another point that will probably get me in trouble. Almost every parent will say this. no matter how bad their parenting experience is turning out to be, they'll all tell you it is worth it. This is because if they were to admit that it wasn't worth it, they would resent their children terribly. This would not make for a good parent. Therefore, convincing yourself that it's worth it is the first step in being a good parent. Once a parent has convinced themselves that it's worth it, many will feel compelled to try and convince you, the childless, that it would be worth it. The childless person should not try and disillusion the parent since the idea that it is worth it is central to being a good parent. Instead, the childless should just smile, agree that the parent is probably right, and then go on planning their next wonderfully quiet child-free vacation that the parent will likely never get to experience. As one of my friends (who had three kids at the time) put it to me a number of years ago .... "We were coming back from a vacation at the beach in Mexico. You could tell all the people on the plane that didn't have kids by the fact that they looked good and relaxed after spending a week on the beach, while all the parents looked bedraggled and worn out. It wasn't fair! I wanted to go and convince them all that they needed to experience having children just so I wouldn't feel so jealous!"