For starters, is the accused part of the Rroma? I didn't see any evidence of that, at least in the article. But even if he is, that's ONE person who, by himself, cannot speak for an entire group as large as the Rromani.
The Rromani, better known as the gypsies, do have a negative reputation in European society but we really should look past that when analyzing individuals. There are many who are decent human beings, and if this Jed Foster is a Rroma he really is an exception since most at the very least aren't murderers. Even the negative stereotype has them more as swindlers and thieves. That stereotype, even if true, doesn't justify any genocide towards them, so Hitler was NOT right in leading so many to their own deaths.