Though probably true, it is irrelevant. Hamas doesn't have the power, and Israel does. This war is almost entirely one sided.
That is definitely not true.
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.
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.
Try the same, but opposite argument.
Something like: Would you wear a t-shirt saying “Palestine is treated unfairly” to oct7 memorial or airport/border crossing?