You state: "Arguing for the destruction of Israel is totally fine, and is not even necessarily anti-Semitic, assuming that the critic's arguments somehow do not single Israel out or hold it to a totally different standard than any other states."

I disagree with this statement for several reasons. First, in theory, although it may not be specially antisemitic, anti-nationalism is in general anti-human. It is a denial of humans' basic right of association. For most people, their people hood is their primary ideological identification. And usually where it isn't (extremists excluded), it's because the national identify is sham in the first place and their natioal identity actually lies elsewhere. The argument is like saying someone isn't a bigot because he hates everyone. Not exactly a positive statement.

Second, Jewishness consists of a triarchy (a hierarchical trinity) of ideas, as I originally posted. God. Torah, Israel (nation or people, called in modern terms the Jews). Religious Jews believe that there is a priority to these ideas, and even non-religious Jews recognize their importance. I'm not talking about the modern state of Israel, although I am making reference to the ancient existence of the Jewish people by using the ancient name Israel for the Jews. Denying Israel's existence is based in part on denying that the Jews are a nation, and that is per se antisemitism. And it works both ways. Suppose someone said that they hated Judaism because they hated all religions, but that they didn't hate Jews as a people (or as a "race"? Is that still not antisemitic? Jewish religious minorities such as Neturei Karta are a different matter. They don't deny Jewish national identity. They believe that the State of Israel contravenes the Torah and the will of God, which take precedence over the national existence of the Jews. Their position is that Israel should not exist, yet. Most anti-Zionists deny Jewish national existence for all time.

Third, at the receiving end, I don't really care whether someone hates my existence because they don't like nationality in general or whether they specifically hate only Jewish nationality. It feels like being hated either way. Same for being hated either because I'm a member of the Jewish religion or the Jewish people. Hate is hate.

Fourth, many, if not most antisemites use the terms Zionists, Israel, and/or Jews interchangeably. In fact, the term anti-Zionist came into favor as a way to hide their antisemitism.

Fifth, as you point out, most anti-Zionists single out Israel. In fact, how many anti-nationalists have you ever heard of who give aid and comfort to the enemies of any state except Israel? I know of none. And that suggests to me that in practice that the idea is just another smokescreen to hide antisemitism.

Sixth, I am more concerned with attacking ideas than I am specific people. Someone can be a very nice person, treat me very well as a Jew, and still have noxious beliefs. In most cases, it's the ideas I hate, not the person harboring them.

The concept of a unified Jewish people in no way allows one to claim that mere criticism of Israel's government (or even of the Israeli people and their desires) is antisemitic, since by "Israel" in this instance is meant the nation of Israel (the idea that the Jews are a nation), not the State of Israel. It does mean that almost any denial of the Jewish people's right to a national existence is antisemitic.