What is the meaning of the word "Nokev"?
Rashi: It means 'One who curses. 1
According to R. Eliezer of Garmaiza, it seems that it is piercing. Refer to 24:11:1:2.
Why does the Torah insert "ka'Ger ka'Ezrach" here?
Seforno: To dissuade us from thinking that the Megadef was punished due to the fact that he was a Ger, because a native is equally guilty for blaspheming Hashem.