Quite. I don't think it's unreasonable to expect someone to check the issue tracker before blogging and I don't think Andrew's response was at all problematic.

I'd say the only issue what the "too dumb, but whatever" comment.

That should have been removed and it would have been totally reasonable.

Edit: Oh actually, the author has another blog post titled "I'm too dumb for Zig ...". With that context, it makes sense and I agree it's a reasonable response. I'm sure other readers like me didn't know that context though.