As one guy put it, "I can tolerate Triumph...at least GB was an ally."
Your answer to that should be, "Then why do you ride a Jap bike?" Harley has so many Japanese parts now it hardly qualifies as an American machine any more. When the suspension, the fuel delivery system, the electronics and electrical system to name a few, come from Japan it isn't American. The only American bike left is Victory. Maybe that's why they all ride with that pissed off look?