Vulcan's were always haughty who saw emotional races as lesser. Just watch Amok Time.
And really, it makes sense. An entire species and culture roots out all that is perceives to have been its downfall. It must look on species that still embrace such folly as unenlightened at best, savages at worst.
I rememeber the Enterprise episode that showed saurek witnessing the downfall of his society (before logic was embraced) and I always thought vulcans were inherently humble because of this. I guess after hundreds of years, this lesson gets forgotten