I think it's okay to generalise and blame a group of people, but then, when you meet someone from that part of your country, you have to give that person the benifit of the doubt and not condemn them right there and then. And it's okay to be angry some time, but you have to get over it after a while.
But I wouldn't go as far as saying hatred, because then this leads to genocide.
In Quebec, we're used to being dislike in the rest of the country, to the point it is almost a national pride to defy the federal authority.
That's what makes politics fun. Doesn't it?