LOL No need. It's an honest mistake. Again, the language is more to "blame" than the people. As a child I DID think they were actually Dutch until my dad explained it to me. Can't blame people for thinking otherwise when the name (albeit incorrectly) clearly states Pennsylvania DUTCH. The best one I can recall hearing back when I was about twenty, while visiting friends in Baltimore, went something like:
"It must be so strange for you, coming from such a progressive, liberal place like Holland, to find how conservative 'our' Dutch people (aka the Amish) are!"
I must admit, sometimes I exaggerate just how liberal we are over here, just to see how much people are willing to believe. Hope none of them ever come to Holland genuinely expecting complimentary 5 ounce packs of ganja at Amsterdam Central Station. They're bound to be disappointed XD XD