Who is really a Jew?

There has been some debate of what constitutes a jew today. If you have heard the news, there's a far right Hungarian politician who found out that he has Jewish blood. So he stopped attacking Jews.

In my Latin American world, there are some who think they are Jews, because there heritage hints that they had a mother or father of Jewish ancestry.

There are also issues among Jews as to ascertain who is truly Jewish. So this is an ongoing issue.

I leave you this article from The Economist for you to ponder this issue.