"You guys literally have no idea how fortunate you are to have good waves with so few people. Surfing's about sharing waves and experiences and stories between both friends and strangers."
What's the difference between their attitudes and your initial attitude towards someone with an SUP sticker on their car? Are you entitled to waves that the SUPer might be catching?
I'm only trying to play devils advocate.
I think any of this, "stay home" attitude is crap. Everyone is entitled to have fun. If they're being an A-hole or doing something wrong, let them know that they are.
I think you are missing the point, your the one hating on someone that has a SUP sticker on their car. Saying you want to cut them off on the road, that is a pretty bold statement. I could see your agrument being valid if you acutally were at the beach, surfing, or where even on your way to the beach to grab a surf. No need to throw out being "hardcore" or "you have traveled here and there." If that is true you would know that 99% of the time local surfers anywhere you go don't like you unless you know them.