"ummm...no"? That's pretty rude.
I'm not just making it up. Do you even know where I'm from? I started the whole post with That's interesting because where I'm from it's the exact opposite
Your reply is pretty narrrow-minded. Jim and James are not seeen as the same name here and most people would not know it's a nickname for James. And then you can say that I'm wrong as many times as you like, it's still the way it is.