You're right, it is a free country. You posted your opinion, naturally, he responded. You are claiming the race card here, which I'm pretty sure is not the issue. Ever consider maybe people do not like the design because it is very different from the way WoW is represented right now?
Here's a better question; can you explain why most the reaction is negative? You act as if you know everyone else's opinion, clearly mixing it with your own, then you pull the 'free country' b.s. when someone comes at you with an opinion that differs from yours.
Again, back to your statement. He replied because he has an account on these forums, he clicked 'reply' and put in his words. Who are you to determine why he posted in the first place?