Basically your "evidence" consists of the fact that these people support Israel as proof that they are Jewish.
Bill Maher supports Israel because he identifies as a Jew ethnically and in this sense he is not "in the closet", however, you've provided no evidence that he actually holds any Jewish religious beliefs. He also sees Israel as a democracy in the Middle East and supports it on that basis as well.
Geert Wilders doesn't support Israel because he loves Jews, but because he hates Muslims and Arabs. It's a real simple "enemy of my enemy is my friend" position he's taking.
There are a number of reasons people may support Israel besides belief in Judaism:
1. For secular/agnostic/atheist Jews it can be a matter of simple ethnic nationalism-- which is really what Zionism, broadly, is. There are both secular and religious wings of Zionism. I suggest you do some research on that.
2. For Christians and other non-Jews it can be one of a number of reasons (or all of them)
(a) Hostility towards Muslims and Arabs-- as with Geert Wilders an "enemy of my enemy is my friend" perspective.
(b) Blind/loyal support for US imperialism and foreign policy goals. Israel serves as a neo-colonial outpost for American and British imperialism, and the jingoistic pro-imperialist cheerleaders in America and Britain support Israel as a military ally.
(c) Related to the above, I can tell you that in America, many people support Israel simply because the corporate media supports these imperial interests and has brainwashed many people in this country by painting a very biased picture of the conflict in which the Israelis are good guys and the Palestinians bad guys.
(d) For Christian Evangelicals in particular support for Israel is related to a particular end-times prophecy where all the nations will turn against Israel and many of the Jews will convert to Christianity just before the apocalypse.
In conclusion, there are many, many reasons why someone who does not actually practice Judaism or believe in its religious tenets would support Israel, therefore support for Israel is not actually evidence that someone is a Jew in the religious sense, nor even necessarily in the ethnic sense-- and that is the only argument you've provided.
In case you define a "closet Jew" as someone having sympathies for Israel and/or supporting the state of Israel: Yeah: Those people may very well be "closet Jews" just like Einstein(who was a deist/agnostic, but is racially a Jew.)
It boils down to Jew as a religion vs. Jew as a "race".
Goddamit, can't you people read the rules of this subforum? It's called one-on-one debates for a reason. Post your comments in Ringside Seats.