Wow. That's a lot of bias towards a group that some consider very biased.
I was riding a Harley back in the 70s when T-shirts read: "I'd rather push my Harley than ride a rice burner." Yes, the "AMF days." Truth be told, most of my Harley riding friends didn't feel that way... you just didn't see Harley t-shirts that read "My ride's OK, your ride's OK."
That's how bias starts. There IS a Harley mystique - the bikes do feel like "big American steel." They have torque that feels like you can pull tree stumps. Nothing else feels quite like a Harley, although all the Japanese manufacturers have tried to build their version.
For the record, I have had 9 Harleys over the years: a couple Sportsters, a couple cruisers, their first try at a "sport touring" bike (the FXRT), and several full dress FLs... never had a clunker; the only one that leaked oil was the FXRT and that was because of an enclosed chain (boot made of rubber) in an oil bath. They should have gone with the belt drive (I also had a first year Sturgis, that was their first model with belt drive). None ever gave me problems or stranded me in thousands of miles of riding.
But, there were riders of other brands who made disparaging remarks. Frequently. I chalked it up to: the Harleys were more $$ than their wanna-be bikes that were bland to ride... i.e. jealousy.
I see that same anti-Harley bias here regularly. NOT ONCE have I came across any HD rider who put down me or my Vespa. And, I have ridden my GTSs to the Sturgis Motorcycle Rally the last 4 years. Not one snide remark.
There is zero scooter culture here in deep south Texas (aka: the Tropical Tip), but there are plenty of Harley riders. Again, not a single bad remark in our time here.
While on my previous GTS, I was waiting for a bridge to close to get off our island. Parked next to me was a guy on a full dress Harley. He looked at my Vespa and said, "Those Vespas are a classic. Looks good."
I said to him, "Vespas are to scooters as Harleys are to motorcycles." We both understood.
I agree that Harley management has made some missteps in their marketing over the years. And, there are some riders who buy into that "If you don't ride a Harley, you ain't shit," attitude. But, not the majority. Most are just like us: they ride because they like to ride. They like to own a bike that they take pride in. If they don't dress the same way you do when you ride, it doesn't make them a poser or a pirate... in spite of that "rugged individualist" thing, they are trying to fit in as they see fit.
I spent a lot of years riding without a helmet (other than in the rain), and I have owned quite a few leather jackets (and chaps) over the years. I've owned Hondas, Yamahas, a couple BMWs, a Suzuki, and a Triumph (along with those Harleys). One thing I haven't done: look down my nose at what anyone else chooses to ride. I don't get that attitude, regardless of what you ride.