I view them as different in that this is about your personal identity. An example, is if a Republican Governor commits a crime -- should I care? Not really, it doesn't change the party platform. Maybe a minor impact associated with their chance at re-election. But when your identity is caught up with party, now you start to defend the governer purely because of their party. It's not simply a party affiliation, but your identity.

This is much larger and intractable than partisanship.