There is such a thing as antisemetism but often the term is abused to silence criticism. It’s similar how woke sorts smear those that disagree with them on some policy issue as “racist’ or “fascist”. Words have a meaning beyond slurs. Because of the atrocities Germans caused Jews, today they tend to throw around the word “antisemitism” liberally out of guilt. Thurnberg clearly has a strong moral compass. She might show bias in the conflict but its because of her obvious leftist politics not because she is antisemitic. Having a different opinion on issue does not mean you hate some group as a whole. The “anti-semetism commisioner” is not only making a fool of himself but undermining the power of the word antisemetism by diluting its meaning. Eventually people tune out nonsense. It’s like the boy who called wolf.
We all occasionally make mistakes in our wording. It can be difficult to phrase things when talking conflict between groups. That does not necessarily imply bigotry. It really depends the frequency and context of the criticism. You can usually tell who the real bigots are because they can only see negative in other groups but not their own.