Another interesting question is this, as a father would you force it on your child to also fan the same club you're a fan to, or you will allow him be himself to fan any club of his choice even if it's your most rival club of all times.
just because i'm a fan of a football club, i won't force my child to like what i like. for example, i like manchester united and my child likes manchester city, why not? if he doesn't like the football club that i like, it doesn't mean anything to me, because the most important thing is his enjoyment of supporting the team he likes.