Jewish groups have been supporting those protests in the US, Europe and Israel.
I have no idea what crowd composition at European protests looks like, but the vast majority of the people upset about the ongoing genocide are not antisemetic.
There is a propaganda campaign in the US trying to conflate being against genocide with being antisemetic. I'm sure similar tactics are being used in Europe.
I am myself supporting many of these protests, and it's exactly from this perspective that I say that many of them are antisemitic. But this is a bit of a useless discussion because neither you nor I can bring any evidence into how antisemitic they are, or how and if they would react if (or when) Palestinians are slaughtering Jews.
If you think it's nonsense, try to go into a anti-war protest with a t-shirt saying that Jews too should be able to live in Middle East. If this thought makes you slightly concerned, you got my point.
I have no idea what crowd composition at European protests looks like, but the vast majority of the people upset about the ongoing genocide are not antisemetic.
There is a propaganda campaign in the US trying to conflate being against genocide with being antisemetic. I'm sure similar tactics are being used in Europe.