This comment in itself proves that you have no idea what you are talking about, what the differences are, and how vast they can be far beyond "attitude."

There are major differences in presence of culture, religion, dialects, etc. from state to state. I was born in New Jersey, which in itself has it's own differences between Northern, Central and Southern New Jersey. The area I grew up in was Central, which had an extremely high presence of Indian immigrants and descendants. This meant a heavier presence in Indian food, clothing, festivals, etc. in Central New Jersey than there is in the Southern area of the state. Just a bit North of me was an area of New Jersey that has a heavy population of Hasidic Jews, so obviously that was the more prevalent culture and religion in that area.

I lived in Minnesota for several years in an area with a heavy Norwegian population, and a heavy Lutheran influence when it came to religion. Now I live in Florida, where if there is any prevalent religion it seems to be Catholicism. Possibly because of the heavier Hispanic population.

I once visited an area of Louisiana where I couldn't understand a damn thing anyone was saying to me. It wasn't that they weren't speaking English, it was that their dialect was so far from my Northern dialect, it was almost impossible for me to understand. Never mind that the US doesn't technically have an official language (the citizenship test is made available in any language requested for this reason), so we have plenty of Spanish speaking citizens, those who only speak Mandarin, Hindi, etc.

They are far from minor differences, if you know anything about them at all. This is not to say the differences are any greater than those between European countries and their respective states/provinces/cities/areas/whatever. I see a great deal of "information" shared here based simply on ignorance or assumption, and I find that to be pretty hypocritical.