In [this question][1], why was [this answer][2] deleted?  The answer is a question intended to demonstrate reasoning -- the question asked if Eisav was Jewish, using Yaakov as an example as Jewish by birth, and the answer tried to show the flaw in that reasoning.  (Answer text: If Yaakov was Jewish, was it by birth or by accepting God and torah? If the latter, this has no bearing on Eisav.)  The answer was deleted as off-topic and I'm trying to understand the problem.

(Sorry if Meta isn't the right place to ask this either.  I couldn't leave a comment on the deleted answer.)

  [1]: http://judaism.stackexchange.com/questions/9042/was-eisav-jewish
  [2]: http://judaism.stackexchange.com/questions/9042/was-eisav-jewish/9043#9043