We've owned more than 50 bikes of all makes and models. In recent history, our collection included bikes from Honda, Yamaha, Harley, and Moto Guzzi.
Some folks (both sides of the fence) are just shallow.
Mine is bigger than yours.
Although, I do have to say that I catch more crap from metric riders when I'm riding one of my Harleys, than the other way around.
The easiest thing to do is just to ignore them.
BUT - be aware than many folks are just trying to be friendly and maybe start a conversation..... and maybe they just suck at it.
Sometimes a guy will throw you a bone, to see if you throw it back.
Oh yeah, I'm normally guilty of that..... pulling up next to a Honda, while riding MY Honda, and saying something like "HEY - I hear them Honda's SUCK."
It's a character flaw. I know it. I'm working on it.