Reading through more of that page you linked, their antisemitism becomes wildly apparent. Notice what's missing in their in their unconscionably distorted version of Israel's history. No mention of the diaspora. No mention of pogroms. No mention of the Holocaust. The only reasons they present for the movement of Jewish self-determinism is zealotry and colonialism. And that's only the beginning when it comes to this site. Israel and Palestine have been waging a long war of propaganda (you'll see equally distorted histories from Israeli advocates). That being said, there is a clear presence of antisemitism (explicit or implicit) BDS groups' tactics and rhetoric. It's important to think critically about the narratives being present by both sides to understand the complexity and nuance of the whole affair. Unfortunately, that nuance is severely lacking.