This was news to me:
I visited Seattle for the first time a month ago and was warned someone might throw a bottle at my car for my California plates. In Portland, I saw “No Californians” signs slapped onto “for sale” signs in yards. In Denver, I read news articles about friendlier locals advising Californians to tell people they were from literally anywhere else. You can Google virtually any city plus the phrase “hate Californians” and find pages of forums and articles giving voice to the hatred of Golden State jerks “ruining” cities. This is not true for other domestic migrants.