Do British people hate Americans from the South for some reason?

I live in Spain where there's a lot of British tourists. I'm from Texas and my buddy is from New Orleans, and we both have a pretty thick Southern accent when we speak English. Over the last few days I've encountered a lot of British people make negative comments about us when they hear our accents, some on the funnier side and some straight up derogatory, mainly talking about how we're dumb Southerners, how our accents sound uncultured, or on one occasion, had a British woman try to derogatorily imitate my accent, I told her she was not doing good and she called me "another rude American". This has been happening specifically with British tourists. I know that's the general perception of Southerners in general, but do the British particularly have something against us?