I think you find many people who poo poo people that don't have their chosen . I know Honda (usually Goldwings), H-D, (don't get started with pickup trucks) etc. people that bad talk other brands. Heck I know many riders that scooter riders are a lower class. I think the more people that ride bicycles, scooters, motorcycles or other none 4 wheel (or more), make motorcycle riders safer. I wave or nod at walkers, runners, scooter, moheads.
I have had good rides with all bikers and motorcyclist (BMW like that one). At RoadRunner weekend you get all types of riders, some kind of look down at smaller bikes, but mostly just a diversified group of people that just like to ride motorcycles.