From wikipedia: "The original Budweiser Bier or Budweiser Bürgerbräu, had been founded in 1785 in Budweis, Bohemia, Holy Roman Empire and had started exports to the US in 1871 resp. 1875. In the U.S., Anheuser-Busch started using the Budweiser brand in 1876 and registered it two years later."
I'm from Australia, whose traditional beers are only margainally better than yours. But the microbrew movement is slowly but surely taking hold here too.
Your argument about thirst quenching doesn't hold much water either. Bud is no more thirst quenching than soda water. In the hot climate here I prefer bitterness to aid thirst quenching, an IPA is brilliant for this (yes, originated in dreary old England). Also consider a gin&tonic, the bitterness of the tonic water is what makes it so refreshing.
Feel free to defend your local beers, but a few facts here or there don't go astray either.