a special word for being prejudiced against the Roma People

According to wikipedia you have several choices: "antigypsyism, anti-Romanyism, antiziganism, ziganophobia, or Romaphobia".

Furthermore there are terms "porajmos (also porrajmos or pharrajimos—literally, "devouring" or "destruction" in some dialects of the Romani language)... Balkan Romani activists prefer to use the term samudaripen ("mass killing")" to describe the holocaust on Romani people.

It's difficult to over emphasize how willfully ignorant the above commenter is. They don't care about jews or roma. This is an example of real anti semitism, which continues to pervade, and is the reason why Israel and its oligarchs can get away with mislabeling legitimate activity as such. Because everyone knows there are people like this running around who are seeking to ride the wave of empathy for the palestinians (who they also don't care about) to stir up anti-jew attitudes.