If you know my history at all, you'll know that I will give numerous very patient and thorough explanations, and observe others doing the same, long before I resort to personal attacks.
And yes, Algr has a very long history on 0.999... He had a pretty long period off the thread, but he returned fairly recently. There doesn't really seem to be any point in trying to explain things to him, although I and several other editors do continue to do so, as you can see on that very same thread.
I don't really give a shit if you block me; all that happens in that event is you've just lost a decent editor, for a very petty reason on your part, since it's obvious that no one was actually fooled by the edit.