In fact I'm not aware of that. I'm aware of disputes over conversion, which is irrelevant in Soros' case. I'm aware of apostacy had he converted, which doesn't apple, or expulsion from the Jewish community, rare and generally the local community. But I’m not aware of any question about the religious status of the child of a Jewish mother, irrelevant but father too, who hasn’t converted, as a Jew. Some Congregations might not welcome him, but that’s a different thing. We can’t just make these things up cause we don’t like the guy.
On some levels, the Obama ideology resembles those of various tyrannic regimes down through history. Fortunately, it hasn't reached anywhere near the level of heinousness of Nazi Germany yet, but only the diligence of the American people can prevent it from swinging more in that direction.
Right, he’s not Hitler, America not only hasn't reached anywhere near the level of heinousness of Nazi Germany yet, yet isn’t even in the equation. America isn’t going to round up Jews and kill them. These comparisons make conservatives look like nuts. More appropriate to the other thread, which I largely passed on, but you can’t credibly attack the left for making Nazi comparisons unless you’re willing to attack the right when they do it. It goes to credibility.
As for the more general issue as to "Who is a Jew?", you have to agree that there are some cases where this is a thorny problem. Israel has had to define Jewishness for the purpose of immigration policy, and that legal definition of "Jew" in Israel has caused some controversy. Most notoriously, there have been young Russian immigrants to Israel admitted as "Jews" who have no immediate Jewish family background and who have caused a lot of trouble in Israel by perpetrating antisemitic incidents.