I think it would be a mistake not taking you on, because of your appearance; it probably makes you look "cool", and it's a sorta vibe with which the young ones could probably relate. Sure, some might not dig it, but I expect there's always gonna be someone who finds talking to you more comfortable, because you're more expressive? Free? I can't explain exactly what I'm thinking, but hopefully you get the gist.

I wouldn't message him, I'd talk to him in person; I'd remind him that I'm a human-being, just like everyone else. So yeah, while I do support you standing your ground, I can't help but to think it'd hold much more weight being done in person.

Best of luck.