In this particular example, a claim was made that a tirade against zionism is actually a coded tirade against jews, which make no sense whatsoever and can't be justified by any actual consideration of the words.
Ok, what does "wipe out the Zionist death cult" mean?
Zionism is the support for the establishment/existence of the Jewish State of Israel.
There are lots of people who think that Israel shouldn't exist, and should disappear from the map. People on these marches, in fact.
So when "from the river to the sea" was chanted, some people pretended it was about liberating Palestinians, not getting rid of Israel.
And when people say "end the occupation" the claim is that they mean the West Bank, when actually there are people who consider the whole of Israel to be occupied Palestinian territory.
Wipe out the Zionist death cult is a clear signal that they want to eradicate Israel. They want it to no longer exist.
I'm sure some will try to pretend that's not what it means but I think those protestations are getting increasingly weak.
So, these people are calling for the eradication of Israel. To deny that this has anything to do with antisemitism and purely to do with Israel deserves closer scrutiny.
The question is: do you think that they would be calling for the eradication of Israel if it wasn't a Jewish state (the only one in the world, in fact). Do you think they would be saying this if it were a Muslim state?
There are plenty of other, even newer countries in the region where people have been displaced and land has been grabbed. Are there calls to wipe them off the map?
And then, when you look at groups like the Houthis who don't even bother to hide it, they say "Death to Israel, a curse upon the Jews". The anti-Israel sentiment and the antisemitism are clearly linked.
So denying that this sort of fervent antizionism isn't at all linked to antisemitism or motivated by it doesn't really wash.
Obviously there are useful idiots who don't really understand the implications of what they are saying, but I'm pretty sure this guy does.