Skiing is cool. Snowboarding is cool. Let's just leave it at that.
I find it to be overwhelmingly the case that any rider (boarder or skier) with a modest degree of ability and a passion for their sport, are stoked on the other sport. At the end of the day, both are looking to have fun and to progress/learn. In my experience, as long as you're courteous, friendly, and generally not an asshole, boarders and skiers get along perfectly well. In fact, I think it's cool to see each sport influence the other (obviously snowboarding has had an infinitely larger effect on newschool skiing than vice versa, but it's beginning to come full circle).
In my opinion, there's a definite correlation between hating on the other, and having a low self-esteem/being insecure. My theory is that someone who's uncomfortable in their own skin and in turn, what they do, reflexively hate on those that do differently out of a preemptive defensiveness, or fear of being judged.
The whole "us vs. them" bullshit is almost entirely the creation of fucking gapers on both sides. Arrogant traditionalist skiers who view snowboarding as some bastardization of their "sacred" sport are fucking lame, and boarders who think that they're somehow edgy or cool by default because they board rather than ski, are equally as lame.
The whole Danny Kass thing was stupid...1.) He was just flat out wrong. AND 2.) Who gives a fuck what he thinks? He's barely clinging to whatever bit of relevancy he's got left. Other than that, I can't recall another example of a legit rider, on either side, having anything negative to say about the other.