Student or Learner
Brando said: "You've seen every single race besmirched, but you never saw an image of thekike because the Jews were ever so watchful for that—and rightly so. They never allowed it to be shown on screen. The Jews have done so much for the world that, I suppose, you get extra disappointed because they didn't pay attention to that.
1) What does "rightly so" mean here? Does it mean "Jews were right in being so watchful" ?
2) I can't understand the sentence in blue. What does it mean?
I am not sure whether it is correct but what is given in Wikipedia(what I quoted) is so ambiguous.