Also, you framed question incorrectly.
You have two options since you admit there is anti semitism.
#1) Jews are smarter than average people and hence succeed more. Similar to the NBA example its obvious who belongs and who doesn't
OR
#2) Jews have to work harder to overcome the antisemitic culture in order to succeed.
If we start from the premise that antisemitism exists, then the first question is, does antisemitism prevent Jews, on average, from succeeding in school, work, etc.
I think you'd agree that the answer to the first question is no. Right?
If you agree with that, then this is how you should have framed your post:
1) Antisemitism is institutional but doesn't prevent Jews from succeeding because they are smarter and harder working, on average, than everyone else.
2) Antisemitism isn't institutional.
Which is it?
The way you did it, the only options are: Jews are smarter or Jews are harder working.