And regarding Palestinian solidarity being conflated with anti-semitism, according to this The Guardian article, it stems from people conflating Jews with Israelis:
Whereas it used to be mostly an extreme-right phenomenon, police say some of the most virulent antisemitism now comes from young people of Muslim origin, who identify with the Palestinians as victims and conflate French Jews with their Israeli oppressors.
There are more sources that report on the rise in anti-semitism:
ranging from the desecration of cemeteries to antisemitic graffiti and banners, social media attacks, vandalism against Jewish property, threats against Jews and a handful of assaults
The current Masalit massacres are being done by Muslims