Earlier quoted context omitted.
A better analogy would be to say losing all your money due to corrupt and greedy bankers is "Jewish Banker Syndrome". Still not offensive?
A marvellous false analogy.
Evil bankers exist of lots of ethnicities and faiths but lots of people do (often but not always subconsciously) link greedy bankers and jewish people.
Just like using unhealthy or even dangerous additives is often linked to Chinese cuisine even though they're used just as much in tons of other cuisines as well.
Equating an existent stereotype with one which doesn't actually exist and saying "it's not that bad, I wouldn't be offended by that" is the false analogy. Because then it doesn't have the personal impact a prejudice or misconception you've actually been exposed to has.
A white person might say that if someone joked "all white people are lazy", they wouldn't be offended so a black or latino person shouldn't either. A black person is much more likely to be offended by "all black people are lazy" because that's something that's actually rooted in societal prejudices. Change it to "all white people are racist" and suddenly by their defensive tone, you'll note that you've hit a nerve and they're actually uncomfortable and/or offended.