If you doubt this, try reading the above excerpt and replacing “Zionists” with “blacks” and see whether you see racism.
Well yes if you change the subject to a racial epithet, many sentences are racist.
Isn’t Zionism a specific political belief that doesn’t indicate race/nationality/religion?
https://www.newstatesman.com/politics/uk/2018/08/context-jeremy-corbyn-anti-semitism-john-mcdonnell-today-show-labour