My two primary riding buddies are part of the Harley cult (no piece of gear that's not Harley, Harley line F-350, Harley coffee mugs, probably a Harley tattoo). What I've seen in them and others like them is an inability to understand that every motorcyclist doesn't lust after a Harley.
I often rent a Harley when visiting home in Myrtle Beach, SC over Christmas. If it comes up that I ride a BMW, the people at the dealership invariably say, "Once you ride one of these, you'll never go back." I've stopped even trying to correct them.
I visit Harley dealerships when riding with a buddy who rides HD. Not a hardship for me. I like all bikes. When the salespeople try to convert me, I just tell them. "Someday. I'm only 58, and not ready to slow down yet." It's good natured on my part. I've seen their mouth open and close a couple of times because they can't think of how to respond.