Tone and choice of words are, unfortunately, everything when it comes to communicating via text.
I have to admit I was pretty put off by our polish friend's attitude early on. But the patience of those who have the subject well in hand won the day, and it turns out that really this guy's not a bad sort at all. He seems open to learn, and is probably a fun cat to throw down a couple beers with. I'd like to hear him play.
I'd also say that it's probably good practice to walk with some grace, whatever side of the perceived fence you happen to be on. Life is too short to entertain a short fuse with someone who hasn't finished having their chance. And that might be you, bro.