Wow that's a terrible comment - I won't even point out the difference between 100 years old and the age of humanity.

But any basic knowledge of history should tell you that anti-semitic feelings in Europe were building up in the 19th century. For example Hitler was a huge fan of Richard Wagner (who died 28 years before this 1911 theft), who wrote a famous article, first published anonymously then later republished in his own name, called "Das Judenthum in der Musik", blasting Jewish composers such as Mendlesohn.