I just skim-read the article, but my critic falls rather on the title itself.
Who decides what kind of "protests cross into antisemitism"?
It is all about definition of antisemitism, and in #Germany (for example) you can find all imaginable (and even unimaginable) statements branded as antisemitism.
The way this opinion article makes the protesters responsible for being "antisemitic" is nothing but an act to silence and intimidate them/us.
( 🙏 don't take it personal. Writing mainly for the group.)