I feel like this will be a shocking revelation to most of them. Everyone in America who isn't Texan thinks they are pretty silly, blowhards, and wish they would shut up about how great Texas is if they have to deal with them for extended periods of time. But nobody actually hates Texans.
This really isnt true about Californians though. There isn't just an undercurrent of dislike. It really does come off as legit inter tribal Hatred. Many Americans don't even think of Californians as fellow countrymen. They view them as a hostile "other" that is the enemy.
In many respects this is due to the outsized cultural influence of Hollywood, combined by the massive economic and political power of the largest State in the country by population and GDP. It just cannot be avoided that what happens in California will have effects as far afield as West Virginia. But when the California Congressional delegation votes to change Carbon Emission regulations federally at the behest of Urban Liberals in San Francisco and LA, causing you to lose your mining job, you start to hate. If you are someone in southeast Ohio who bitched on Facebook on why you need to wear a mask in a bar while standing and not while sitting and then turbo banned by moderators in Silicon Valley, you start to hate.
It's going to be interesting to see what the ramifications of this will be politically and culturally, because as we can see in this thread the undercurrent of Hate isn't below the surface anymore. It will require some significant introspection by everyone in the country. But will this introspection be possible, especially with Trump about to be President?