He can voice that opinion because a he is correct the sources only say he was Jewish but not that this is relevant to this writings on racism b it is established Wikipedia policy that we don t call out a person s background be it racial religious or ethnic or other unless it is pertinent to the topic as evidenced by reliable sources making that connection and c this is the consensus on this page 3 editors have told you that what you are proposing is not acceptable it is time for you to stop edit warring it back into the article