Got Questions, Mongrel?
Gilgamesh is a fictional character from Fate/Stay Night and other Type Moon series like Fate/Zero, Fate/Hollow Ataraxia, Carnival Phantasm, etc. Google him to find out more. This blog is for fun. Don't take it seriously.
The King of Heroes is upset because some fans are assuming that those two Sabers are the same person. He also doesn’t like their inability to play the game or at least try to Google “Saber Nero" or "Saber Fate/Extra”. Do your research, mongrel.
Because some or perhaps many (?) people think that all Sabers is Arturia. Even those who claim that they have played Fate/Extra think that Nero is also Arturia. Some would even cosplay Nero thinking that she’s Arturia. :(