That sounds like "Hitler made trains run on time, therefore anyone who thinks trains should run on time agrees with Hitler". While it is very legitimate to disagree with the author of the manifesto, linking him to some antisemitic conspiracy theory on the base that they both don't like Marxists is insane. A lot of people don't like Marxists (in fact, many Marxists don't like other Marxists, and had murdered fellow Marxists by millions), that doesn't make them all the same.