I don't have any information on folk's history here, I just help where I can, and point out the obvious where it seems to need pointing out.
Since I don't see any evidence of Mani being rude here I can not possibly be finding his rudeness acceptable.
However what is very rude is to conclude that I, or anyone else, is ignorant without cause, and to claim I am ill mannered. I defy anyone to show any point at which there is evidence of this.
Feel free to print an apology in your own time. I won't hold my breath.