Irish, Germans, Greeks, Italians, Portuguese, and Spaniards also weren't considered white in the US for a long time.
What Kahane-Was-Right is saying is true, the word "Jew" is thrown around like the N word. It's used to refer to someone in this country as a person that is despised of and unwelcomed. I hear it mentioned quite often, people use the phrase "you stupid Jew". I hear it less where I live because most people here are extremely religious and the baptist in general love Israel, but if you go throughout the midwest or anywhere else, it's pretty common to find individuals who are not so welcoming of Jews.