The purpose of the rally is to "stand against the Zionist settler invasion on Al Aqsa in Jerusalem Palestine."
Which means to stop Jews from peacefully walking on Judaism's holiest site.
Here's one such recent "invasion:"
This isn't a pro-Palestinian rally. This isn't even a rally against the Jerusalem Flag March, which will not enter the Temple Mount.
The entire stated purpose of this rally is to deny Jews any religious rights to Judaism's most sacred spot.
Denying Jews basic human rights is the very definition of antisemitism.
When it comes down to it, every "pro-Palestinian" demand is a variant of denying the right of Jews to live in peace and security in their ancestral homeland.