Try being an Anglo in "Welsh" Wales - you will then learn all about hostility, which includes charging non Welsh speakers higher prices.
My second language is rudimentary French and in spite of the fact that the Brits and French have been knocking seven bells out of each other for the last 1000 years I've never had any problems there.
I didn't have any problems in Chama or Antonito either - the locals I spoke to were friendly - some of the visitors were plain obnoxious though. In most countries I've visited if you respect the locals they'll respect you - treat them like inferior beings however.......
G