Edit:
To respect the feelings of our Serbian comrades I would like to point out that this is not representative of the protests at large.
I am literally just trying to say: look at this freak I found. The normal libs are the ones carrying the bloody hand print sign from the ZLF. It looks similar to this. In the pic above it has a QR code. The Opposition in general are attempting to co-opt this protest movement.
“Free palestine” is a very short slogan known to many and also it’s an inherently anti-US position to hold given how the US unabashedly supports genocide. More detailed slogans are very rarely in English from my experience