In this case, I don't think the author is antisemitic. But when common antisemitic themes come up in a text, you can bet that some readers, me included, will perk up and start looking for other ones.
[1] https://www.adl.org/news/op-ed/the-protocols-revisited-the-f...
[2] https://www.adl.org/resources/backgrounders/jewish-control-o...
[4] https://www.jpost.com/diaspora/jewish-space-lasers-funny-mar...